Kaštel Gomilica was built in the first half of the 16th century by the Benedictine nuns from Split. The nuns built it on the estate (Pustica) which they received as a donation from King Zvonimir of Croatia in 1078.[2] They also built the Romanesque church of St. Cosmas and Damian in 1160, and erected a Catholic Monastery on a small island known today Kaštilac.[3] Kaštel Gomilica was used as one of the shooting locations in the HBO series Game of Thrones where it was used as a backdrop for the Free City of Braavos.[4] source wikipedia