Zülpich Castle origins may be traced to a Roman castrum. The present site was built in the late 14th century as a symbol of sovereignty and outpost of the archbishops of Cologne against the County of Jülich.
Razed by French troops at the end of the 17th century, the ruins of the lowland castle ended up in private hands. The Zülpich manufacturing family of Sieger opened a schnaps distillery in the castle until 1870 that operated until the 1980s. In the Second World War it was badly damaged, was partly rebuilt in the 1950s and acts today as a tourist information bureau and home of the Zülpich History Society.
Zülpich Castle is a modest brick building with an almost rectangular plan with high towers at the corners. It is one of the classic quadrangular castles of a type ideal for the Late Middle Ages. Its austere-looking defences are almost entirely devoid of architectural features and underline its fortress-like character which befits its location at the southwestern corner of the medieval town of Zülpich and its incorporation into the town's fortifications.
The enclosed quadrangular structure was originally surrounded by a moat. At its southern, western and eastern corners are round towers that were all once four storeys high. In the north and at right angles is a square tower measuring 10×10 metres with corner ashlars that is the only survivor of an older castle. The present appearance dates the 17th century. The two full-height round towers are topped by protruding, open fighting platforms with brick battlements. All the round corner towers once had residential rooms with fireplaces and garderobes. The western tower facing the town also acted as a dungeon.
The four wings were formerly two-storey residential ranges with high basement vaults. Today only the thick outside walls have survived. The remaining structure of the present-day wing dates to a later period because the original roofs and interior walls from the 17th century have not survived.
The best preserved exterior wall is on the southeast side with the main gate made from carefully cut bunter sandstone ashlars to which the drawbridge used to lead. Above the portal are two, angled coats of arms whose details were probably destroyed by French soldiers in 1794. They used to depict the arms of Frederick of Saarwerden and probably the Archbishopric of Cologne.
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.