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 Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.