Fossacesia is a city in the province of Chieti in the Abruzzo region of Italy. The town is located on a small hill on the left of the Sangro River's mouth, about 2 kilometres (1 mi) from the Adriatic Sea.The main attraction of the neighbourhood is the Abbey of San Giovanni in Venere. The town is home to the Romanesque church of San Silvestro, dating to the 11th century.