Yedekçiler Mescidi

The Zakarists Mosque was a historic religious building located on Kennedy Street outside the walls of Topkapı Palace in the Fatih district of Istanbul.

The mosque was built during the reign of Solomon II as part of the Boston Hospital. The building, which became a metric structure in the 1930s, was largely demolished in the 1940s along with its minaret; the remaining ruined sections were completely removed during the construction of Kennedy Street.

The church, built in stone, was covered with a brick roof and had a single minaret.