The Castle Amerongen was built in 1673 on the site of a previous stronghold that had been burned by the French troops during the invasion of 1672. The current building was designed by the architect Maurits Post as a baroque palace for the owners Godard Adriaan van Reede and his wife Margaretha Turnor. In the main hall a central staircase with painted ceiling was built by Willem van Nimwegen. Other ornaments were added in the early 20th century by P. J. H. Cuypers. The gardens contain historical elements and the walls predate 1673.
Near the entrance bridge dating from 1678 is a wooden clock tower from 1728 that contains the original clock of the same date. In the north-east corner of the gardens is an orangerie dating from the 1880s, and the north wall was raised during the period when Wilhelm II was residing there 1918-1920. He abdicated in Amerongen then moved to Huis Doorn.
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.