The Tour de Gerolata or Fortin de Gerolata (Corsican: Torra di Girolata) is a Genoese tower located in the commune of Osani (Corse-du-Sud) on the west coast of the French island of Corsica. The tower sits at an elevation of 36 metres (118 ft) on a rocky outcrop in the Golfe de Girolata.The tower was built between 1551 and 1552.