The Huis ter Kleef castle was probably built in the late 13th century. In 1403 it was given to Margaret of Cleves (c.1375-1411), and has since retained that name. During the Siege of Haarlem in 1572 it was the headquarters of the Spanish army, under the leadership of the duke of Alva. It was blown up in 1573 and badly damaged, the rubble was used for city expansion. The house nearby with a tower called the 'Kaatsbaan' was long considered the only building left standing, though recent archeological research suggests that the foundations have older stones than the rest and perhaps it was itself rebuilt after the explosion.
The property changed hands several times until it was purchased by the city of Haarlem in 1713. Stones from the central castle ruin can still be seen in surrounding buildings. The Kaatsbaan was used as a residence for former owners and is now also in use by the city gardens.
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.