Crathes Castle is a 16th-century castle near Banchory in the Aberdeenshire region of Scotland. Construction of the current tower house of Crathes Castle was begun in 1553 but delayed several times during its construction due to political problems during the reign of Mary, Queen of Scots. It was completed in 1596 by Alexander Burnett of Leys, and an additional wing added in the 18th century.
This harled castle was built by the Burnetts of Leys and was held in that family for almost 400 years. The castle and grounds are owned and managed by the National Trust for Scotland and are open to the public.
The castle contains a significant collection of portraits, and intriguing original Scottish renaissance painted ceilings survive in several Jacobean rooms.
During 2004 excavations uncovered a series of pits believed to date from about 10,000 years ago. The find was only analysed in 2013 and is believed to be the world's oldest known lunar calendar. It is believed that it was used from 8,000 BC to about 4,000 BC. It is believed to pre-date by up to five thousand years previously known time-measuring monuments in Mesopotamia.
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.