Pilgrims and Umrah performers in the outer courtyard of the Sacred House of God in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, the Grand Mosque, Hajj season, Makkah landmarks, Islamic holy places
Group of workers cleaning the hills of Safa at the Grand Mosque, Jabal Al Safa and Al Marwa in Mecca, Saudi Arabia, Islamic holy places, Islamic religious landmarks, Islamism and worship
Pilgrims of the Sacred House of God in the Holy Mosque of Mecca in the Kingdom of Saudi Arabia, performing prayers in the Grand Mosque in Mecca, worship and drawing closer to God, performing the rituals of Hajj and Umrah, Islamic religious landmarks, the
Pilgrims at the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah, pilgrims walking in the outer complex of the Grand Mosque, worship and getting closer to God, Islamism and worship, Islamic holy places
Performing the rituals of Hajj and Umrah, circumambulating around the Holy Kaaba, a close-up of pilgrims to the Holy House of God near the door of the Holy Kaaba, the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, sacred Islamic religious places an
Portrait of a man sitting in the Grand Mosque in Mecca, worshiping in the houses of God, remembrance of God, Islamic religious landmarks, Islamism and worship, Saudi Arabia
The Holy Mosque of Mecca, the Grand Mosque in Makkah Al-Mukarramah from the inside in the Kingdom of Saudi Arabia, Islamic architectural art, performing Hajj and Umrah rituals, Islamic religious landmarks, Islamic holy places
Pilgrims and Muslims in the courtyards of the Holy Mosque in Mecca, cleaning the courtyards of the Holy Mosque in Mecca using cleaning machines, vehicles and machines, cleaning crews in the courtyard of the Holy Mosque in Mecca, the Grand Mosque in Mecca
The outer courtyard of the Grand Mosque at sunset, the architectural art of building the towering minarets in the Islamic style, the outer courtyards of the Grand Mosque in Mecca, Saudi Arabia, performing the Hajj and Umrah rituals, sacred Islamic religious landmarks, places of worship and obedience
Pilgrims of the Sacred House of God in the courtyards of the Holy Mosque of Mecca, the clock tower in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia at night, performing the rituals of Hajj and Umrah, sacred Islamic religious places and monuments
The entrance to the Grand Mosque from abroad, the engineering architecture in the old Islamic style, the features of the Holy Mosque of Mecca in the city of Makkah Al -Mukarramah in the Kingdom of Saudi Arabia, Islamic sacred religious places, worship and closer to God, perform the rituals of Hajj and Umrah
Interest in the public park surrounding the mosques, the Grand Mosque of Sharjah in the United Arab Emirates, architectural art and designs of the external area in the Arab-Islamic style, famous religious landmarks in the Emirate of Sharjah, worship and getting closer to God.
Sacred Islamic religious places and landmarks, the Grand Mosque in Mecca, Saudi Arabia, Muslim pilgrims in the courtyards of the Grand Mosque at night performing the Hajj rituals, the concept of worship and drawing closer to God
Ornate domes and minarets, architectural geometric art, 3D Islamic decorations and designs, an illustration of the majestic Grand Mosque surrounded by a flower, design of an ancient-style Islamic mosque, white background
Pilgrims and Umrah performers in the streets surrounding the Grand Mosque in Makkah Al-Mukarramah, Kingdom of Saudi Arabia at night, buses transporting Umrah performers to the Grand Mosque, the towers of the Grand Mosque, the landmarks of Makkah Al-Mukarr
Minarets and ornate domes, 3D Islamic decorations and designs, an illustration of the design of an Islamic mosque in white in natural places, architectural engineering art in the ancient Arab style, places for worship, obedience, and getting closer to God, nature background
Pilgrims and Umrah performers in the Holy Mosque of Mecca in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, circumambulating around the Kaaba, the Holy Kaaba, Hajj season, Hajj and Umrah, the Grand Mosque in
The Grand Mosque in Mecca, the Kingdom of Saudi Arabia, performing Hajj and Umrah rituals, worship and getting closer to God Almighty, sacred Islamic religious landmarks, gathering of pilgrims and Umrah performers in the square of the Holy Mosque of Mecca
Sacred Islamic religious places and monuments, the shrine of our master Ibrahim, peace be upon him, in the Grand Mosque of Mecca in Mecca in the Kingdom of Saudi Arabia, pilgrims and Umrah performers in the courtyards of the Grand Mosque in Mecca, perform
Performing Hajj and Umrah rituals, pilgrims and Umrah performers in the courtyard of the Grand Mosque in Makkah Al-Mukarramah in Saudi Arabia at night, the Holy Mosque of Mecca, Islamic religious landmarks, Islamic holy places
Pilgrims at the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah, pilgrims walking in the outer complex of the Grand Mosque, worship and getting closer to God, Islamism and worship, Islamic holy places
Close-up of the Kaaba in Mecca, the Kaaba cover, Quranic verses on the Kaaba cover, the Black Stone, the Holy House of God in the Holy Mosque in Makkah Al-Mukarramah in Saudi Arabia, Islamic holy places, the entrance to the Kaaba in the Grand Mosque in Ma
Introducing the golden chandelier in the style of ancient Arabic lanterns and chandeliers into architectural designs, a picture from inside the Grand Mosque in Mecca, the Kingdom of Saudi Arabia, King Abdullah’s expansion of the Holy Mosque in Mecca, sacred religious landmarks and places
Old-style mud forts, famous tourist places and landmarks in the United Arab Emirates, a close-up of a Land Rover in one of the historical places during the day, a destination for tourists from different countries, the Al Qattara Arts Center in Al Ain.
The Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, worship and drawing closer to God, Islamic religious landmarks, the courtyard of the Grand Mosque, the towers surrounding the Grand Mosque,
Adding chandeliers and chandeliers to the architectural engineering designs, introducing motifs and decorations of the ancient Islamic style, King Abdullah’s expansion of the Grand Mosque in Mecca, a picture from inside the Grand Mosque in Makkah Al-Mukar
Performing Hajj and Umrah rituals in Mecca, the architectural art of the Royal Clock Tower, pilgrims circumambulating the Kaaba in the Grand Mosque, the concept of worship and drawing closer to God, sacred Islamic religious places and landmarks in the Kingdom of Saudi Arabia
A picture of the Grand Mosque in the Kingdom of Saudi Arabia, a group of people performing Hajj, the beauty of the Grand Mosque in Mecca, religious tourism in Saudi Arabia
The Kaaba in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, cleaning crews cleaning the courtyard of the Grand Mosque in Mecca, pilgrims and Muslims in the courtyards of the Grand Mosque in Mecca, Islamic religious landmarks, Islamic holy places
The concept of worship and getting closer to God, King Abdullah's expansion of the Grand Mosque, interior decorations and architectural designs in the modern Islamic style, sacred Islamic religious landmarks, a Saudi Arabian Gulf man sitting in the Grand Mosque performing the obligatory prayer in Mecca, Saudi Arabia
An aesthetic close-up picture of lights hanging in the Grand Mosque in Mecca from the inside, the beauty and splendor of Islamic architecture, Arab Islamic arts and decorations, the Grand Mosque in Mecca, Saudi Arabia
The Noble Sanctuary in Mecca, Saudi Arabia, Performing Hajj and Umrah, Hajj season 2023, Muslim pilgrims circumambulate the Holy Kaaba in Mecca, the Grand Mosque
A panorama view from the top of the Grand Mosque in Mecca, Saudi Arabia, performing Hajj and Umrah, worship and getting closer to God, Islamic religious landmarks, Hajj season 2022, Muslim pilgrims performing prayer around the Kaaba in Mecca
Distinctive cardboard designs of the Kaaba in the Grand Mosque in Mecca, famous Islamic landmarks in the Kingdom of Saudi Arabia, places where Muslims gather from all over the world, performing Hajj and Umrah rituals
Old Souq Al Qattara Mosque in the United Arab Emirates, ancient folk architectural style, use of bricks and clay in building structures at night, famous Islamic religious places and landmarks
Performing Hajj and Umrah rituals in Mecca, the architectural art of the Royal Clock Tower in the Grand Mosque, the destination of Muslims all over the world, the concept of worship and drawing closer to God, sacred Islamic religious places and landmarks in the Kingdom of Saudi Arabia
Famous landmarks and mosques of Dubai, interior design and decoration of houses of worship in the Islamic style, Ahmed Majid Al Ghurair Mosque in the Al-Raqqa area, performing Islamic holiday rituals, Muslims gathering to perform Eid prayers in the United Arab Emirates
A picture from above of the Grand Mosque in Makkah Al-Mukarramah, the House of God and the Kaaba in the Kingdom of Saudi Arabia, Islamic holy places, the Holy Meccan Mosque, worship and closeness to God in mosques
A call to Muslims to perform religious duties, architectural art in the modern Islamic style, a close-up of the minarets of the Grand Al-Muhanna Mosque in Al-Shaqra Governorate in the Kingdom of Saudi Arabia at daytime, Islamic landmarks and holy places, the concept of worship and closeness to God Almighty.
Performing Hajj and Umrah rituals, minarets of the Grand Mosque in Makkah Al-Mukarramah, sacred Islamic religious landmarks, Hajj season 2023, the square of the Grand Mosque in the Kingdom of Saudi Arabia, towers and skyscrapers, Islamic architectural art
The Grand Mosque in the Kingdom of Saudi Arabia, a three-dimensional illustration of the Holy Kaaba in Mecca, a ray of light shines from the Great Kaaba and illuminates the blackness of the night, the crescent in the middle of the sky, worship and closeness to God, sacred Islamic religious places and landmarks, an aura of faith, sanctity and spirituality
A picture of the Grand Mosque in the city of Mecca in the Kingdom of Saudi Arabia, the square of the Holy Mosque in Mecca, the muezzins of the Holy Mosque in Mecca, worship and getting closer to God, Islamic religious landmarks in Saudi Arabia
Pilgrims of the Sacred House of God in the Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, circumambulating the Holy Kaaba, Islamic holy places
Architectural engineering art of skyscrapers, a view from above of the towers surrounding the Grand Mosque in Mecca, the Qiblah of Islam and Muslims, performing the Hajj and Umrah rituals, worship and getting closer to God, sacred Islamic religious places and landmarks in the Kingdom of Saudi Arabia
Group of workers cleaning the hills of Safa at the Grand Mosque, Jabal Al Safa and Al Marwa in Mecca, Saudi Arabia, Islamic holy places, Islamic religious landmarks, Islamism and worship
The Grand Mosque in Mecca from the inside in the Kingdom of Saudi Arabia, Islamic architectural art, the chandelier and hanging lights in the Holy Mosque of Mecca, the arts and decorations of Islamic architecture, the introduction of the golden chandelier in the style of ancient Arab lanterns
Introducing chandeliers and chandeliers into architectural designs, luxurious Islamic gypsum decorations on ceilings, a picture from inside the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, sacred religious landmarks and places, King Abdullah’s expansion of the Holy Mosque in Mecca.
Islamic holy places, the Grand Mosque in Makkah Al-Mukarramah from the inside in the Kingdom of Saudi Arabia, Islamic architectural engineering art, the Holy Mosque of Mecca, performing Hajj and Umrah rituals, Islamic religious landmarks
Pilgrims at the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah, pilgrims in the outer complex of the Grand Mosque, worship and getting closer to God, Islamism and worship, Islamic holy places
The Grand Mosque in Mecca, Saudi Arabia, performing Hajj and Umrah rituals, worship and drawing closer to God, Islamic religious landmarks, Muslim pilgrims and Umrah performers circumambulating the Kaaba, the distinctive architecture of the Royal Clock Tower building, Islamic holy places
Pilgrims and Umrah performers in the Holy Mosque of Mecca in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, circumambulating around the Kaaba, the Holy Kaaba, Hajj season, Hajj and Umrah, the Grand Mosque in
Clay pots and pottery products, a cultural and entertainment destination, Al Qattara Arts Center in Al Ain, a destination for tourists from various countries, famous places and tourist attractions in the United Arab Emirates, old-style pottery pots and lanterns
The Kaaba in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, pilgrims and Muslims in the courtyards of the Grand Mosque in Mecca, cleaning crews cleaning the courtyard of the Grand Mosque in Mecca, Islamic religious landmarks, Islamic holy places
Islamic religious landmarks, cleaning crews cleaning between Safa and Marwa in the Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, architectural art, worship and closeness to God, Islamic holy places, islamism and worship
A picture of the pilgrims of the Grand Mosque in Mecca, the circumambulation around the Kaaba, the courtyard of the Grand Mosque in Mecca, performing the Hajj, worship and getting closer to God, Islamic religious landmarks in Saudi Arabia
Places where Muslims from all over the world gather, performing Hajj and Umrah rituals, distinctive cardboard designs of the Kaaba in the Grand Mosque in Mecca, famous Islamic landmarks in the Kingdom of Saudi Arabia.
Famous Islamic landmarks, the architectural art in building the white domes on the Sheikh Zayed Grand Mosque in the Emirate of Abu Dhabi during the day, the modern Islamic style of the mosques of the United Arab Emirates, places of worship and getting closer to God Almighty
A Saudi Gulf Arab man inside the Dubai Mall in the Emirate of Dubai, tourism in the United Arab Emirates, shopping centers and luxury stores, places for recreational family activities, geometric art, designs and interior decoration of malls
Muslims gathered in the courtyards of the Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia at night, establishing prayer, the Sacred House of God, the Clock Tower, Islamic holy places
Pilgrims of the Sacred House of God in the outer courtyard of the Grand Mosque in Makkah Al-Mukarramah, Saudi Arabia, towers and hotels overlooking the Grand Mosque in Mecca, pilgrims of the House of God feeding pigeons, Islamic landmarks, religious touri
Muslim pilgrims in the courtyards of the Grand Mosque at night performing Hajj rituals, the concept of worship and drawing closer to God, sacred Islamic religious places and landmarks, the Grand Mosque in Mecca in the Kingdom of Saudi Arabia
Pilgrims and Umrah pilgrims in the outer square of the Grand Mosque in Mecca, Islamic gathering from all over the world to perform worship and draw closer to God, luxury hotels and towers surrounding the mosque, sacred Islamic religious places and landmarks, cloudy sky background
Islamic religious landmarks, performing Hajj and Umrah rituals, the Holy Mosque of Mecca, a close-up of pilgrims and pilgrims in the courtyard of the Grand Mosque in Mecca in the Kingdom of Saudi Arabia at daytime, cities and holy places, architectural art in the Islamic style
Luxury hotels and towers surrounding the mosque, pilgrims and Umrah pilgrims feeding pigeons in the outer square of the Grand Mosque in Mecca, Islamic gathering from all over the world to perform worship and get closer to God, sacred Islamic religious places and landmarks, blue sky full of clouds
Pilgrims of the Sacred House of God in the Holy Mosque of Mecca in the Kingdom of Saudi Arabia, performing prayers in the Grand Mosque in Mecca, worship and drawing closer to God, performing the rituals of Hajj and Umrah, Islamic religious landmarks, the
The Royal Clock Tower building in the Grand Mosque illuminated at night, pilgrims and Umrah performers in the Holy Mosque, Islamic architectural style of towers and skyscrapers in Mecca, landmarks and sacred religious places in the Kingdom of Saudi Arabia
Pilgrims and Umrah performers in the Holy Mosque of Mecca in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, circumambulating around the Kaaba, the Holy Kaaba, Hajj season, Hajj and Umrah, the Grand Mosque in
Sacred religious places in Islam, a black and white top view of the Grand Mosque in Saudi Arabia, the architectural art of the Holy Mosque in Mecca with the Kaaba in the middle in the middle, the influx of Muslims to perform Hajj and Umrah rituals
Sheikh Zayed bin Sultan Al Nahyan Mosque in the Emirate of Abu Dhabi in the United Arab Emirates, Islam and worship, Sheikh Zayed Grand Mosque, the minaret of Sheikh Zayed Mosque
Holy Islamic religious places and landmarks in the Kingdom of Saudi Arabia, the architectural art of the Royal Clock Tower in the Holy Mosque of Mecca, performing Hajj and Umrah rituals in Mecca, worship and getting closer to God Almighty.
A close-up of a mosque on Burj Khalifa Street in Dubai, the distinctive architectural engineering design in the United Arab Emirates, worship and closeness to God, establishing and performing prayers, the towers and buildings of the city of Dubai, Burj Kh
Pilgrims of the Holy House of God circumambulate the courtyards of the Holy Mosque in Mecca, sacred Islamic religious places and landmarks, the clock tower in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah rituals, worshiping and getting closer to God.
Performing the obligatory prayers and prayers, acts of worship and getting closer to God, the orientation of Muslims to perform the rituals of Hajj and Umrah, the Holy Kaaba in Mecca, the destination of Muslims in all parts of the earth, the circumambulation of pilgrims around the Sacred House of God in the Holy Mosque of Mecca.
The dome of a mosque in the city of Dubai, places of worship and closeness to God Almighty, domes and minarets for mosques, architectural engineering art in the United Arab Emirates, Islamic tourist attractions
Pilgrims and Umrah pilgrims standing in the outer square of the Holy Mosque in Mecca, sacred Islamic religious places and landmarks, Islamic gathering for worship and getting closer to God, luxury hotels and towers surrounding the Grand Mosque, view of the blue sky full of clouds, performing Hajj and Umrah rituals.
Muslims come from all over the world to perform Hajj and Umrah rituals, worship and get closer to God, the Sacred House of God in the Holy Mosque of Mecca in the Kingdom of Saudi Arabia, sacred Islamic places and landmarks, the circumambulation of pilgrims and Umrah around the Holy Kaaba in Mecca.
Creative image of the clock tower in Makkah Al-Mukarramah, Saudi Arabia, the House of God, the traffic and cars in the streets of Makkah Al-Mukarramah, the towers of Al-Haram Al-Makki, the royal clock tower in the Grand Mosque in Makkah, the tallest clock
The Noble Sanctuary in Mecca, Saudi Arabia, Performing Hajj and Umrah, Hajj season 2023, Muslim pilgrims circumambulate the Holy Kaaba in Mecca, the Grand Mosque
Pilgrims at the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah, pilgrims walking in the outer complex of the Grand Mosque, worship and getting closer to God, Islamism and worship, Islamic holy places
Architectural design of buildings and residential towers on both sides of the road, Ibrahim Al-Khalil Road near the Grand Mosque, upscale tourist hotels in Mecca, paved streets in the roads of the Holy Mosque in Mecca.
Pilgrims of the Sacred House of God in the outer courtyard of the Grand Mosque in Makkah Al-Mukarramah, Saudi Arabia, towers and hotels overlooking the Grand Mosque in Mecca, pilgrims of the House of God feeding pigeons, Islamic landmarks, religious touri
The Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, worship and drawing closer to God, Islamic religious landmarks, the courtyard of the Grand Mosque, the towers surrounding the Grand Mosque,
Worshiping and getting closer to God, circumambulating around the Holy Kaaba in Mecca, gathering of pilgrims and Umrah pilgrims in the courtyard of the Grand Mosque, performing Hajj and Umrah rituals, the Noble Mosque of Mecca in the Kingdom of Saudi Arabia, sacred Islamic religious monuments and places,.
Approaching God Almighty by supplication and good deeds, a close-up of a group of pilgrims' hands touching the Holy Kaaba in the Holy Mosque of Mecca, visiting the Sacred House of God in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umra
Islamic religious landmarks, the Grand Mosque in Makkah Al-Mukarramah from the inside in the Kingdom of Saudi Arabia, Islamic architectural engineering art, the Holy Mosque of Mecca, performing Hajj and Umrah rituals, Islamic holy places
Sacred Islamic religious places and landmarks in the Kingdom of Saudi Arabia, performing Hajj and Umrah rituals in Mecca, pilgrims to the House of God circumambulating the Kaaba in the Grand Mosque, the concept of worship and drawing closer to God
The Grand Mosque in Mecca, the Kingdom of Saudi Arabia, introducing the chandelier in the style of ancient Arab lanterns and chandeliers into architectural designs, sacred religious landmarks and places, luxurious Islamic gypsum decorations on the ceilings, King Abdullah’s expansion of the Holy Mosque in Mecca
Sacred Islamic religious landmarks, an interior picture of the Grand Mosque in Mecca, Islamic architectural art of mosques in the Kingdom of Saudi Arabia, performing Hajj and Umrah rituals, worship and getting closer to God
Modern means of transport and communications in the UAE, a directional signboard in Arabic and English for the Dubai Metro in the Dubai Mall in the United Arab Emirates, a rapid transit railway network
The Grand Mosque in Mecca, Saudi Arabia, performing Hajj and Umrah rituals, Muslim pilgrims circumambulating the Kaaba, sacred Islamic religious sites, worship and drawing closer to God, view of the sky filled with clouds, white minarets in the Islamic style
Chinatown inside Dubai Mall in the United Arab Emirates, tourism in Dubai, famous places and entertainment attractions, attracting tourists to visit malls and shopping centers, visitors flocking to Dubai Mall stores
A picture of the Grand Mosque in the holy city of Mecca in Saudi Arabia, the Holy Mosque in Mecca, worship and getting closer to God, Islamic religious landmarks in Saudi Arabia
The concept of worship and getting closer to God, a picture from above of one of the mosques in Dubai, the distinctive architectural engineering design for building mosques in the United Arab Emirates, establishing and performing prayers, decorations and ornaments in the Islamic style
The development of architectural engineering for the luxury hotels and towers surrounding the Grand Mosque, the clock tower overlooking the Holy Mosque in Mecca, sacred Islamic religious places and landmarks, the view of the blue sky filled with clouds
The entry of pilgrims and Umrah performers to the Grand Mosque from Fahd Gate, the Grand Mosque in Makkah Al-Mukarramah in Saudi Arabia, the Holy Mosque of Mecca, performing the rituals of Hajj and Umrah, Islamic religious landmarks, Islamic holy places
Pilgrims and Muslims in the courtyards of the Grand Mosque in Makkah Al-Mukarramah in the Kingdom of Saudi Arabia, performing the rituals of Hajj and Umrah, the Hajj season 2023, the Holy Kaaba in the Sacred House of God, Islamic religious landmarks and s
The golden door of the Holy Kaaba in the Holy Mosque of Mecca, a close-up of the Holy House of God, Quranic verses on the cover of the Kaaba, the entrance to the Kaaba in the Grand Mosque in Mecca in the Kingdom of Saudi Arabia
A close-up of the lanterns of the Grand Mosque in Makkah Al-Mukarramah from inside the Kingdom of Saudi Arabia, Islamic architectural art, the Holy Mosque of Mecca, performing Hajj and Umrah rituals, Islamic religious landmarks, Islamic holy places
Pilgrims at the Grand Mosque in Mecca in the Kingdom of Saudi Arabia, performing Hajj and Umrah, pilgrims in the outer complex of the Grand Mosque, worship and getting closer to God, Islamism and worship, Islamic holy places
The Noble Sanctuary in Mecca, Saudi Arabia, Performing Hajj and Umrah, Hajj season 2023, Muslim pilgrims circumambulate the Holy Kaaba in Mecca, the Grand Mosque
Group of workers cleaning the hills of Safa at the Grand Mosque, Jabal Al Safa and Al Marwa in Mecca, Saudi Arabia, Islamic holy places, Islamic religious landmarks, Islamism and worship