Schachenstein Castle was the last hill castle to be built in the Styria. It was built in 1464 by Abbot John II Schachner of Lambrecht as a summer residence and lordly manor. It was extended in 1630 and 1740. From the end of the 18th century the castle lost its significance and fell into ruins.
The main purpose of the fortification was as a home and summer residence of the abbots of St. Lambrecht's Abbey as evinced by a large number of historic records. Subsequently, it was used to seal off the Mariazell road and protect the population of the Aflenz valley - who were looked after by the abbey - as well as providing a refuge during Turkish and Hungarian invasions.
The site of castle was an outstanding choice: some 640 above sea level on rocks forming the southern spur of the Schöckelberg. It is situated on an easily defended constriction of the road from Einodgräben to Mariazell, which was originally also guarded by a fortified gateway.
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.