The first mention of the Tongelaar Castle on this site dates from 1282 when it was dedicated to Count Floris V by Jan van Cuyk. The Van Cuyk family was probably owner of the castle until somewhere in the 15th century when it was owned by the Van Merwick family. In later centuries ownership of the castle passed through several noble Dutch and Belgian families until the 20th century.
The only medieval part of Tongelaar Castle is the square brick tower. This was originally the gate tower and would have been equipped with a drawbridge. The large window would have been the entrance. This tower dates back to the early 15th century. Archeological research proved that there had been a fortified medieval building at the opposite side of the gate tower but that they had not been connected by walls with each other. The tower would have had several living quarters and had a prison below ground level.
All the other present buildings were built in the 18th and 19th century. The western wing was either built on the foundations of an earlier building or built with the use of old building materials.
The tower is now a corner tower of a closed square farm with a simple courtyard.
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.