The House of Callimachi, Calimachi, or Kallimachi (Greek: Καλλιμάχη, Russian: Каллимаки, Turkish: Kalimakizade; originally Calmașul or Călmașu), was a Phanariote family of mixed Moldavian (Romanian) and Greek origins, whose members occupied many important positions in Moldavia, Romania and the Ottoman Empire.