Nusretiye Clock Tower, aka Tophane Clock Tower, is a clock tower situated at Tophane, a neighborhood in Beyoğlu district of Istanbul, Turkey, next to Nusretiye Mosque and Tophane Kiosk at the European waterfront of Bosphorus.

It was ordered by the Ottoman sultan Abdulmejid I (1823–1861), designed by architect Garabet Amira Balyan and completed in 1848.

Designed in neo-classical style, the four-sided, three-story clock tower is 15 m (49 ft) high.

The clock tower along with Nusretiye Mosque and the Tophane Kiosk survived the urban renewal and highway construction program of the mid-1950s.

[1] However, it remains within the customs warehouse area of Istanbul Port, cut off from public access today.