Regensburg (; historically also Ratisbon, from Celtic Ratisbona) is a city in Bavaria, Germany, located at the confluence of the Danube and Regen rivers, at the northernmost bend in the Danube. To the east lies the Bavarian Forest. Regensburg is the capital of the Bavarian administrative region Upper Palatinate. The large medieval centre of the city is a UNESCO World Heritage Site.
In 179, the Roman fort Castra Regina ("fortress by the river Regen") was built for Legio III Italica during the reign of Emperor Marcus Aurelius. It was an important camp on the most northern point of the Danube: it corresponds to what is today the core of Regensburg's Altstadt ("Old City") east of the Obere and Untere Bachgasse and West of the Schwanenplatz. It is believed that even in late Roman times the city was the seat of a bishop, and St Boniface re-established the Bishopric of Regensburg in 739.
From the early 6th century, Regensburg was the seat of the Agilolfing ruling family. From about 530 to the first half of the 13th century, it was the capital of Bavaria. Regensburg remained an important city during the reign of Charlemagne. In 792, Regensburg hosted the ecclesiastical section of Charlemagne's General Assembly. The bishops in council condemned the heresy of Adoptionism taught by the Spanish bishops, Elipandus of Toledo and Felix of Urgel. After the partition of the Carolingian Empire, the city became the seat of the Eastern Frankish ruler, Louis II the German in 843. Two years later, fourteen Bohemian princes came to Regensburg to receive baptism there. This was the starting point of Christianization of the Czech people, and the diocese of Regensburg became the mother diocese of Prague. These events had a wide impact on the cultural history of Czech lands, as they were consequently incorporated into the Roman Catholic and not into the Slavic-Orthodox world. The fact is well remembered, and a memorial plate at St John's Church (the alleged place of the baptism) was unveiled a few years ago, commemorating the incident in the Czech and German languages.
Between 1135 and 1146, the Stone Bridge across the Danube was built at Regensburg. This bridge opened major international trade routes between northern Europe and Venice, and this began Regensburg's golden age as a residence of wealthy trading families. Regensburg became the cultural centre of southern Germany and was celebrated for its gold work and fabrics.
In 1803 the city lost its status as a free city, following its incorporation into the Principality of Regensburg. It was handed over to the Archbishop of Mainz and Archchancellor of the Holy Roman Empire Carl von Dalberg in compensation for Mainz, which had become French under the terms of the Treaty of Lunéville in 1801. The archbishopric of Mainz was formally transferred to Regensburg. Dalberg united the bishopric, the monasteries, and the town itself, making up the Principality of Regensburg (Fürstentum Regensburg). Dalberg strictly modernized public life. Most importantly, he awarded equal rights to Protestants and Roman Catholics alike. In 1810 Dalberg ceded Regensburg to the Kingdom of Bavaria, he himself being compensated by the award of Fulda and Hanau to him under the title of "Grand Duke of Frankfurt".
Between April 19 and April 23, 1809, Regensburg was the scene of the Battle of Ratisbon between forces commanded by Baron de Coutaud (the 65th Ligne) and retreating Austrian forces. The city was eventually overrun, after supplies and ammunition ran out. The city suffered severe damage during the fight, with about 150 houses being burnt and others being looted.
World War II
Regensburg was home to both a Messerschmitt Bf 109 aircraft factory and an oil refinery, and it was bombed by the Allies on August 17, 1943, by the Schweinfurt-Regensburg mission, and on February 5, 1945, during the Oil Campaign of World War II. Unlike most other major German cities, Regensburg suffered little damage from the Allied strategic bombing campaign, and the nearly intact medieval city centre is listed as a UNESCO World Heritage Site. The city's most important cultural loss was that of the Romanesque church of Obermünster, which was destroyed in a March 1945 air raid and was never rebuilt (the belfry survived). Also, Regensburg's slow economic recovery after the war ensured that historic buildings were not torn down, to be replaced by newer ones. When the upswing in restoration reached Regensburg in the late 1960s, the prevailing mindset had turned in favour of preserving the city's heritage.
Regensburg Displaced Persons Camp
Between 1945 and 1949, Regensburg was the site of the largest Displaced persons (DP) camp in Germany. At its peak in 1946–1947, the workers' district of Ganghofersiedlung housed almost 5,000 Ukrainian and 1,000 non-Ukrainian refugees and displaced persons. With the approval of U.S. Military Government in the American Allied Occupation Zone, Regensburg and other DP camps organised their own camp postal service. In Regensburg, the camp postal service began operation on December 11, 1946.