A castle (cum castro) in Żywiec was first mentioned in 1467, as destroyed by an army, under Casimir IV Jagiellon's command against the House of Komorowski, with the Korczak Coat of Arms, recorded by Jan Długosz. However it is not certain whether it denoted the castle in the town or a fortifications on a nearby Grójec hill. Archaeological scrutiny dates the origins of the castle in the first half of the 15th century. A later expansion was constructed in 1567 by the House of Komorowski. Under the ownership and will of Jan Spytek Komorowski, during the castle's expansion a Renaissance style courtyard was built, which is still untouched in its current form.
Since 2005, the Old Castle in Żywiec hosts the City Museum in Żywiec. The Old Castle's permanent exhibition includes an ethnographical exhibition - which completes the Wooden Architecture Trail in the Silesian Voivodeship, in Poland.
Żywiec's Old Castle is encompassed by a 260,000 square metre landscape park, which was established initially in the 17th century.
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.