Located on the Danube River, the Old Town of Regensburg is an exceptional example of a central-European medieval trading centre, which illustrates an interchange of cultural and architectural influences. The property encompasses the city centre on the south side of the river, two long islands in the Danube, the so-called Wöhrde (from the old German word waird, meaning island or peninsula), and the area of the former charity hospital St Katharina in Stadtamhof, a district incorporated into the city of Regensburg only in 1924. A navigable canal, part of the European waterway of the Rhine-Main-Danube canal, forms the northern boundary of Stadtamhof.
A notable number of buildings of outstanding quality testify to its political, religious, and economic significance from the 9th century. The historic fabric reflects some two millennia of structural continuity and includes ancient Roman, Romanesque, and Gothic buildings. Regensburg's 11th to 13th century architecture still defines the character of the town marked by tall buildings, dark and narrow lanes, and strong fortifications. The buildings include medieval Patrician houses and towers, a large number of churches and monastic ensembles as well as the 12th century Stone Bridge.
The town is also remarkable as a meeting place of Imperial Assemblies and as the seat of the Perpetual Imperial Diet general assemblies until the 19th century. Numerous buildings testify to its history as one of the centres of the Holy Roman Empire, like the Patrician towers, large Romanesque and Gothic church buildings and monasteries – St Emmeram, Alte Kapelle, Niedermünster and St Jakob - as well as the cathedral St Peter and the late Gothic town hall.
The medieval centre of the city is a UNESCO World Heritage Site and a testimony of the city's status as cultural centre of southern Germany in the middle ages. Regensburg is among the top sights and travel attractions in Germany.
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.