Lichtenstein Castle is a high to late medieval hill castle about six kilometres north of Ebern in the Lower Franconian county of Haßberge in Bavaria. It is located in the municipality of Pfarrweisach.
Of the originally four sub-castles of this great joint-fief or Ganerbenburg only one, the South Castle, is still occupied. The North Castle only survives as ruins. On the site of the now vanished third castle the Protestant Church of the Eternal Flame (Zum Ewigen Licht) was built in the Baroque era. In the southwestern part of the site lie the ruins of a fourth joint-vassal castle seat.
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.