Glengarnock Castle is one of the ancient ruined fortifications of Ayrshire. Its keep is located on a remote rocky promontory overlooking the River Garnock about 2 miles north of the town of Kilbirnie in North Ayrshire. There is no clear account of when this was erected or by whom, but it may have been built by the Cunningham (or Cunninghame) family or by the Riddels who preceded them.
In the 12th and 13th centuries, the lands here were held for the King by the De Morville family, hereditary Great Constables of Scotland. A castle may have been built here by them; a convenient site in relation to the abbey they founded at Kilwinning. The Barony of Glengarnock then passed to the Riddels and the Cunninghames. The Cunninghames retained the castle until the early 17th century and by the 18th century it had been abandoned. The Honourable Patrick Lindsay of Kilbirnie Place purchased the castle and estate of Glengarnock in 1677 from Richard Cuninghame, the last of the Cuninghames of Garnock. In 1707 both baronies were united in the Barony of Kilbirnie, with Kilbirnie Place as the principal dwelling.
The castle is an example of a keep with courtyard attached and dates from the period 1400-1542, with various later buildings in the courtyard.
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.