Château de Louppy-sur-Loison present remains date back to a castle built in the 13th or 14th century. It was built on an elevated piece of land in a loop formed by the Loison river. Originally the feudal castle had a quadrilateral ground plan with circular towers at its corners. It had a deep moat which was fed by the Loison.
The castle was abandoned and fell to ruin later and Simon II de Pouilly built a new Louppy-sur-Loison castle in the first half of the 17th century. The present church was built on the ruins of the old castle in 1878.
At present the remains of the old Louppy-sur-Loison Castle are part of the grounds of the village church and town hall. Its exterior can freely be visited. The New Louppy-sur-Loison Castle is only some 100 meters away.
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.