Çamlıca Mosque (Turkish: Çamlıca Camii) is a mosque located in Istanbul and the largest mosque in Turkey. The mosque can hold 63,000 people and includes a museum, art gallery, library, conference hall, and underground parking lot for 3,500 vehicles.[1][2

The mosque is one of a number of megaprojects built by the Turkish government to show the strength of the economy and provide a legacy for the governing AK Party.

The Çamlıca Mosque was inaugurated on 4 May 2019 by Turkish President Erdoğan. Several world leaders were present at the ceremony including Senegalese President Macky Sall, Guinean President Alpha Conde, Albanian president Ilir Meta, Palestinian Prime Minister Mohammad Shtayyeh and other foreign dignitaries.

The mosque originally opened for prayers in March during the Islamic holy night of Laylat al-Ragha'ip, six years after its foundation was laid, but was still undergoing construction. A successor to grand Ottoman-era mosques dotting Istanbul like the famed Blue Mosque and Süleymaniye, Grand Çamlıca Mosque offers a view of other grand mosques with its location on the eponymous hill on Istanbul's Asian side. The mosque incorporates old and new in its architecture although its exterior is designed in the tradition of old mosques in Turkey. Traces of decoration and building styles from the Ottoman era and pre-Ottoman Seljuk architecture adorn the mosque's interior and exterior.

It is also full of veiled symbolism that the public can only learn from its designers, like six minarets representing the six articles of the faith. Four of its minarets are exactly 107.1 meters tall in a tribute to the 1071 Malazgirt (Manzikert) victory of the Seljuks against the Byzantine army that cemented Muslim rule in Anatolia. Its 72-meter high main dome represents what builders say are the 72 nations that lived in the city. The secondary dome has a diameter of 34 meters after the license plate number for the city. The interior of the dome is inscribed with 16 adjectives attributed to Allah, and it also symbolizes the number of states founded by Turks in history. Atop the main dome is a three-piece finial that weighs 4.5 tons, and at a height of 7.77 meters, the largest of its kind.

The mosque also has one of the largest temple entrances in the world: A 5-meter-wide, 6.5-meter-high door weighing 6 tons. Before that, an enormous marble arch marks the entrance to the courtyard with verses from the Quran inscribed on it. The main door also contains verses from the al-Imran surah or chapter of the Quran. Inside, a 9,000-piece, 220-meter-long horizontal plate placed under the dome contains the al-Fath surah in its entirety.

It is situated in the middle of a 90-acre piece of land covered with greenery specifically to make it closer to nature, unlike other mosques in the city that are stuck amid the concrete jungle. A short walk from the mosque gives visitors a magnificent view of the Bosporus on the outskirts of Çamlıca Hill.

The association behind the mosque's construction, which consists of several donors, picked the mosque's design from 62 candidates and was ultimately inspired by the works of Sinan the Architect, a legendary Ottoman-era architect credited with beautiful mosques in Istanbul and other cities. The museum and art gallery are among the highlights of the mosque, separating it from its modern counterparts. The museum will host a number of artifacts and function in part as a venue run by the Topkapı Palace Museum.

The mosque's interior has a capacity of hosting 25,000 people but in total, 63,000 people can pray at the same time with the inclusion of the spacious courtyard.

Delegations from several countries joined President Erdoğan for the opening. Among dignitaries attending the ceremony were Albanian President Ilir Meta, Guinean President Alpha Conde and Senegalese President Macky Sall. Muslim scholars and religious figures from Kazakhstan, Uzbekistan, Iraq, Azerbaijan, Iran, Greece, Montenegro, Palestine and Qatar were also present at the opening.