All that remains of the former Strijen Castle is a single tower fragment of seven storeys high. The building of Strijen Castle probably started in 1288 by Willem Willemszoon van Strijen. Strangely enough the bailey was situated on the territory of the County of Holland and the castle itself on the territory of the Duchy of Brabant. In 1324 the castle was bought by Willem van Duivenvoorde who reinforced and renovated it. When he died the castle became property of his half-brother Jan van Polanen.
In 1573, during the 80-Years war, the castle was destroyed after a siege by Spanish troops. It was never rebuild and fell into decay. In the next centuries the castle ruin was used as a quarry for stones which were used to repair roads and a church in and around the village of Oosterhout.
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.