The Tesvikiye Mosque is a Neo-Baroque building located in Istanbul, Turkey.
It was built in 1794 by order of Sultan Selim III, but most of the current mosque was completed already in 1854 during the reign of Sultan Abdulmechit I.

It was designed by Krikor Balyan, of the famed family of Armenian architects. during this time that several well-known structures in Istanbul were being built or renovated, including Ortaköy Mosque and Dolmabahçe Palace, in styles imported from Europe. It is the front of the mosque, constructed during a renovation in the late 19th century, that gives it a unique appearance, with huge white columns. It has become a sort of stand-out symbol in the upscale, bustling quarter of Nişantaşı. It is also often used as the starting point of funerals for famous and public figures.