1. Masjid al-Haram and Masjid al-Nabawi in Mecca and Medina.
2. Nasir ol Molk Mosque in Shiraz City, Iran.
The Nasir ol Molk mosque, also known as the “Pink Mosque,” was built in 1888 by the order of Qajar ruler Mirza Hasan Ali Nasir al Molk in Shiraz, Iran. The masjid is notable for having a stunning kaleidoscope effect in the morning light.
3. Hassan II Mosque in Casablanca, Morocco.
Hassan II Mosque is the largest mosque in Morocco and was completed in 1993. It was designed by French Architect Michael Pinseau.
4. Dome of the Rock in the Old City of Jerusalem.
The Dome of the Rock was built in the 7th century A.D. by Umayyad caliph ‘Abd al-Malik ibn Marwan. The famous mihraj, or ascension, of the Prophet Muhammad is said to have happened here, as well as the sacrifice of Abraham’s son. The site was built over the Temple Mount and is considered sacred to all three Abrahamic faiths.
5. Larabanga Mosque in the village of Larabanga, Ghana.
Built in the 17th century in the Sudani style of architecture, the Larabanga mosque is one of the oldest mosques in Ghana
6. Wazir Khan Mosque in Lahore, Pakistan.
Wazir Khan Mosque is located in the old city of Lahore and was built in the 17th century during the reign of Mughal emperor Shahjehan. The mosque is named after Shahjehan's trusted aide, Hakim Shaikh Ilm-ud-din Ansari, who was also known as Wazir Khan.
7. Niujie Mosque in Beijing, China.
Located in central Beijing, Niujie mosque was built in 995. It is the oldest and largest mosque in the city.
8. Masjid Dimaukom in Datu Saudi Ampatuan, Philippines.
9. Great Mosque of Djenné in Mali.
The first mosque in the complex was built in the 13th century, while the current mosque dates back to 1907 and is the largest earthen mud building in the world. The Great Mosque was designated as a World Heritage Site by UNESCO in 1988 and is considered by many architects to be one of the greatest achievements of the Sudano-Sahelian architectural style.
10. Jama Masjid in Old Delhi, India.
The Jama Masjid is the largest mosque in all of India and in 1644 was the final construction of Shah Jahan, the Mughal emperor who also built the Taj Mahal.
11. Nizamiye Masjid in Johannesburg, South Africa
The Nizamiye mosque opened in 2012. Though located in South Africa, it is built by Turkish investors in the Ottoman style. The mosque complex also has other attractions, including a clinic which was added by request of then-president Nelson Mandela.
12. Sultan Qaboos Grand Mosque in Muscat, Oman.
The Sultan Qaboos Grand Mosque was first declared to mark Sultan Qaboos’ 30th year of reign and was completed in 2001. The mosque is so large that it can accommodate upwards to 20,000 worshippers in the main prayer hall, while the enormous Persian carpet inside took 600 women four years to weave.
13. Mosque–Cathedral of Córdoba in Córdoba, Spain.
Built in the late 8th century, the Mosque–Cathedral of Córdoba is one of the oldest structures that still remain from Islamic Iberia — a medieval Muslim territory that occupied much of today’s Spain and Portugal.
14. Mosque of Muhammad Ali in Cairo, Egypt.
The Ottoman Mosque of Muhammad Ali is one of Egypt's most prized historical landmarks, finished in 1848 under the patronage of Muhammad Ali Pasha. He is buried at the mosque in a tomb situated in the southwest corner of the grounds.
15. The Great Mosque of Herat in Herat, Afghanistan.
Built on top of where two previous mosques once stood, the Great Mosque of Herat began construction in 1200 AD under the Ghurid ruler, Ghiyath al-Din Muhammad. Construction continued well after his death and was completed in 1220. After a series of pilagings and earthquakes, the mosque was rebuilt in 1498 to its current state.
16. Ubudiah Mosque in Kuala Kangsar, Malaysia.
The Ubudiah Mosque was officially opened in 1917 after a decree by Sultan Idris Murshidul Adzam Shah, the 28th Sultan of Sultan of Perak.
17. Süleymaniye Mosque in Istanbul, Turkey.
The beautiful Süleymaniye Mosque was built between 1550 and 1557, and is situated on one of Istanbul’s seven hills, providing a prominent landmark for the entire city.