Castle Roy is one of the oldest castles of its type in Scotland unique in that it is largely unaltered, whilst most other castles have been extensively modified over the centuries. The castle is thought to have been built at some point in the early 13th century, replacing an earlier wooden motte and bailey keep of Norman influenced design. In accordance with its early design it is one of Scotland’s simplest forts consisting of four curtain walls, about 7 ft. thick, forming a square. Presumably the walls defended a number of timber buildings which have since disappeared. One theory is that Castle Roy was built by James, son of the Earl of Mar, in 1226, after having receiving the title of Lord of Abernethy from King Alexander II. It may have become a residence of the powerful Comyn family, rivals of the famed King Robert the Bruce.
In 1548 the Castle was named in the Charter of the Earldom of Moray and therefore possibly it was still in use, although in the era of gunpowder will only have been of use as a fortified shelter.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.