The Bishop's Palace, Kirkwall was built at the same time as the adjacent St Magnus Cathedral. It was built for the cathedral's first bishop, William the Old of the Norwegian Catholic church who took his authority from the Archbishop of Nidaros (Trondheim). The ruined structure now looks like a small castle.
Originally it is thought to have been like a typical Royal Norwegian Palace, with a large rectangular hall above store rooms and a tower house as the Bishop's private residence. King Haakon IV of Norway, overwintering after the Battle of Largs, died here in 1263, marking the end of Norse rule over the Outer Hebrides. The neglected palace had fallen into ruins by 1320.
In 1468 Orkney and Shetland were pledged by Christian I of Denmark and Norway for the payment of the dowry of his daughter Margaret, betrothed to James III of Scotland, and as the money has never since been paid, their connection with the crown of Scotland has been perpetual. In 1526 the palace came briefly into the possession of William, Lord Sinclair, before he was ordered to return it to the Bishop of Orkney. When King James V of Scotland visited Kirkwall in 1540 he garrisoned his troops in the Palace and in Kirkwall Castle. Soon afterwards' extensive restoration was begun by Bishop Robert Reid, the last and greatest of Orkney's medieval Bishops who also founded the University of Edinburgh. Reid added a round tower, the Moosie Toor.
Ownership passed to Robert Stewart, 1st Earl of Orkney, in 1568, then to his son Patrick Stewart, 2nd Earl of Orkney who planned to incorporate it into his Earl's Palace, Kirkwall, but debts forced him to return it to Bishop James Law. Earl Patrick's son Robert seized both palaces in 1614, and a siege followed, though it is not known if this caused damage to the structures, both of which are now ruins.
References:Trenčín Castle is relatively large renovated castle, towering on a steep limestone cliff directly above the city of Trenčín. It is a dominant feature not only of Trenčín, but also of the entire Považie region. The castle is a national monument.
History of the castle cliff dates back to the Roman Empire, what is proved by the inscription on the castle cliff proclaiming the victory of Roman legion against Germans in the year 179.
Today’s castle was probably built on the hill-fort. The first proven building on the hill was the Great Moravian rotunda from the 9th century and later there was a stone residential tower, which served to protect the Kingdom of Hungary and the western border. In the late 13th century the castle became a property of Palatine Matúš Csák, who became Mr. of Váh and Tatras.
Matúš Csák of Trenčín built a tower, still known as Matthew’s, which is a dominant determinant of the whole building.