Aspelt Castle is a Baroque residence built in 1590 on the site of a medieval castle. The origins of Aspelt Castle date back to the 11th century when a fortified castle with a moat was built on the site, possibly on Roman ruins. The first written reference to the castle can be found in Theoderich von Wied's Echternach chronicles from 1132. The foundations of the round Gothic towers are probably from the 14th century while the current building was completed in 1590 following transformations carried out by the Ruelle, Kempt and Burthé families. In 1777, the Martinys extended the palace and installed new Baroque windows in the towers. In 1957, the ground floor of the south-west tower was restored.
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.