The Château Saint-Sixte is a 12th-century castle in the commune of Freistroff. It stands on a small plain between Freistroff and Rémelfang. It was built in the 12th century by the seigneur Wirich de Valcourt.
During the Renaissance, it was transformed into a residence and was altered again in the 18th century. It was saved from ruin by the Gehl family in 1986. Separated from the village on the left bank of the Nied, it has a strange oval plan, surrounding by ancient moats. The six originally separate buildings are roofed with two slopes of tiles and arranged around an entirely enclosed courtyard. In each corner, a polygonal staircase tower gives access to the upper storeys.
On weekends and public holidays, the owners offer guided tours.
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.