Tvrdalj Castle was the summer residence of Petar Hektorović, the Croatian poet (1487–1572). During the 16th century, the island of Hvar came under attack from the Ottoman Turks. Hektorović, one of the local nobles, undertook to fortify his house so that it could act as shelter for the local citizens.
Tvrdalj is a well-preserved Renaissance building, with a long closed facade on the seaward side, to protect it from attack. The interior courtyard contains a sea-water fishpool, enclosed by a vaulted and arcaded terrace. Next to it is a tower with a dovecote. The living quarters, together with the servant quarters, and several wells, are arranged around the pool. Behind the main buildings is a walled garden where Hektorović cultivated herbs and medicinal plants.
A series of inscriptions are set into walls of the mansion in Latin and Croatian. Those in Croatian are considered to be some of the oldest extant.
In 1571 Stari Grad was again attacked and Tvrdalj was set on fire by the Turks. A year later, Petar Hektorovic died and the damaged Tvrdalj was divided between his relatives. Following provisions in his will, there were gradual improvements made. However, in 1834 the Venetian laws lapsed and Tvrdalj experienced massive construction works: the south wall of the complex was removed, vaults constructed around the pool, a second floor added on either side of the tower, and new two-storey houses were built. The bay in front of Tvrdalj was filled in as part of the harbour improvements. In the 20th century, further major changes were experienced in 1901 when the eastern wall was demolished and houses built over the vault and cistern which is still part of the Tvrdalj entrance.
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.