Istanbul’s Blue Mosque reopened fully on Friday, the first day of the Muslim holiday of Eid al-Fitr, following a restoration effort that began in 2018. This mosque, called Sultanahmet Camii in Turkish, was built by Sultan Ahmet I in 1609-1616 in the square carrying his name in Istanbul, the Ottoman capital. It is the only mosque in Türkiye with six minarets. Europeans call it the "Blue Mosque" owing to its beautiful blue, green, and white tiles. ECI reports, citing Anadolu Agency.