The Molla Çelebi Mosque, sometimes known as the Fındıklı Mosque is a 16th-century Ottoman mosque located in the Fındıklı neighbourhood of the Beyoğlu district of Istanbul, Turkey. It was commissioned by Kazasker Mehmet Vusuli Efendi, chief judge of Istanbul and designed by the imperial architect Mimar Sinan. The mosque is located on the Bosphorus waterfront, close to the Kabataş ferry port and Dolmabahçe Mosque.