The Forum Marinum Maritime Centre exhibits seafaring history and traditions of the nautical culture in the southwest of Finland, history of the naval forces and the maritime history collections of Åbo Akademi University and Provincial Museum.
In addition to permanent and temporary exhibitions there are several museum ships located to the museum or near Aurajoki river. Most well-known ships are full-rigger Suomen Jousten (built in Saint-Nazaire in 1902) and barque Sigyn (built in Gothenburg in 1887). Finnish naval forces are also well represented including the minelayer Keihässalmi and the corvette Karjala.
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.