Saddell Castle was built by David Hamilton, Bishop of Argyll, between 1508 and 1512 from the stones of the ruined Saddell Abbey. The castle was gifted to James Hamilton, 2nd Earl of Arran by Bishop James Hamilton, as payment of debts and taxes in 1556. The Earl of Arran exchanged it with the Chief of Clan MacDonald of Dunnyveg, James MacDonald in exchange for James's lands on the Isle of Arran. The castle was ransacked and burnt in 1558 by Thomas Radclyffe, 3rd Earl of Sussex, Lord Deputy of Ireland under orders of Queen Mary I of England in retaliation of James's involvement in Ireland against the English. The castle was later rebuilt and enlarged together with a trap door in the main entrance passage, which upon activation, sent unwanted visitors into a dungeon which had no exits. In 1607, the Clan Donald lands in Kintyre, including Saddell, were conveyed by King James VI to Archibald Campbell, 7th Earl of Argyll. The castle fell into disrepair when Saddell House was built c. 1774. The castle was bought and restored by the Landmark Trust, which now rents it out as a self-catering property.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.