St Aubin's Fort was developed on a rocky islet off the coast at the western end of St Aubin's Bay. It was finished in the 1540s. At that time St Aubin was the primary port on Jersey and the fort controlled the entrance. In the 17th century the Civil War the Parliamentarians turned it into a stronger fortress, by building a bulwark on it, and when the Royalists regained possession they replaced this with granite ramparts and added a storey to the tower. In the 18th century, and again in the 19th, the fort was rebuilt twice, but in peaceful Victorian times it was let as a summer residence. In the Second World War the Germans strengthened the fort with turret guns and concrete casemates.
A causeway extends from the road in front of the Royal Channel Islands Yacht Club to the fort, and one can walk out at low tide. However, the fort itself is closed to the public. Jersey's Sea Scouts use the fort as a headquarters, storing their sails and other equipment in a German bunker built into the fort. They have also converted a room in the tower into a classroom.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.