Regensburg (also Ratisbon, Latin Ratisbona) is a city (population 151.000 in 2007) 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 Dom (Cathedral) is a very interesting example of pure German Gothic and counts as the main work of Gothic architecture in Bavaria. It was founded in 1275 and completed in 1634, with the exception of the towers, which were finished in 1869. The interior contains numerous interesting monuments, including one of Peter Vischer's masterpieces. Adjoining the cloisters are two chapels of earlier date than the cathedral itself, one of which, known as the old cathedral, goes back perhaps to the 8th century. The official choir for the liturgical music at St Peter's Cathedral are the famous Regensburger Domspatzen.
  
• The Stone Bridge, built 1135-1146, is a highlight of medieval bridge building. The knights of the 2nd and 3rd crusade used it to cross the Danube on their way to the Holy Land.
  
• The Church of St. James, also called Schottenkirche, a Romanesque basilica of the 12th century, derives its name from the monastery of Irish Benedictines (Scoti) to which it was attached; the principal doorway is covered with very singular grotesque carvings. It stands next to the Jakobstor, a mediæval city gate named after it.
  
• The old parish church of St. Ulrich is a good example of the Transition style of the 13th century, and contains a valuable antiquarian collection. It houses the diocesan museum for religious art.
  
• Examples of the Romanesque basilica style are the church of Obermünster, dating from 1010, and the abbey church of St. Emmeram, built in the 13th century, remarkable as one of the few German churches with a detached bell tower. The beautiful cloisters of the ancient abbey, one of the oldest in Germany, are still in fair preservation. In 1809 the conventual buildings were converted into a palace for the prince of Thurn and Taxis, hereditary postmaster-general of the Holy Roman Empire.
  
• Wealthy patrician families competed against each other to see who would be able to build the highest tower of the city. In 1260, the Goldener Turm (golden tower) was built in Wahlenstraße.
  
• The Town Hall, dating in part from the 14th century, contains the rooms occupied by the Imperial diet from 1663 to 1806.
  
• A historical interest is also attached to the Gasthof zum Goldenen Kreuz (Golden Cross Inn), where Charles V made the acquaintance of Barbara Blomberg, the mother of Don John of Austria (born 1547). The house is also the place where Kepler died in 1630.
  
• Perhaps the most pleasant modern building in the city is the Gothic villa of the king of Bavaria on the bank of the Danube.
  
• Among the public institutions of the city are the public library, picture gallery, botanical garden, and the institute for the making of stained glass. The city's Gymnasien (high schools) include an episcopal clerical seminary, and a school of church music.
  
• St. Emmeram's Abbey, now known as Schloss Thurn und Taxis, is a huge castle owned by the powerful Thurn and Taxis family.
  

Near Regensburg there are two very handsome Classical buildings, erected by Ludwig I of Bavaria as national monuments of German patriotism and greatness. The more imposing of the two is the Walhalla, a costly reproduction of the Parthenon, erected as a Teutonic temple of fame on a hill rising from the Danube at Donaustauf, 15 km to the east. The interior, which is as rich as coloured marble, gilding, and sculptures can make it, contains the busts of more than a hundred German worthies. The second of King Ludwig's buildings is the Befreiungshalle at Kelheim, 30 km above Regensburg, a large circular building which has for its aim the glorification of the heroes of the 1813 War of Liberation.