Ravensburg was first mentioned in 1088. In the Middle Ages, it was an Imperial Free City (a city that had a certain amount of autonomy) and an important trading centre. The "Great Ravensburg Trading Society"  owned shops and trading companies all over Europe. The historic city centre is still very much intact, including three city gates and over 10 towers.
Renata took a photo of Kalyn and me walking back into the city across the Old Stone Bridge, a12th-century bridge across the Danube that links the Old Town with Stadtamhof, once a separate medieval village. For more than 800 years, until the 1930s, it was the city's only bridge across the river. It is a masterwork of medieval construction and an emblem of the city. 
Another spectacular building was Regensburg Cathedral, also known as St. Peter’s Cathedral, which opened in 1580. There was too much scaffolding around it to get good photos. 
A highlight was a visit to Walhalla, recommended by one of Kalyn’s friends. Created by the order of King Ludwig of Bavaria, it’s a Neoclassical building in the shape of a temple surrounded by a portico with columns, and is one of the most important German national monuments of the 19th century. Inside are busts of German- speaking men and women of outstanding merit. The foundation stone was laid in1830 and the building was ceremoniously opened in 1842.The architect was Leo von Klenze, and the design was inspired by the Parthenon in Athens. It brought back memories of visit to Athens in 1980. 
I’ve included extras of the outside and inside of the building, Kalyn  inside, and Renata and Kalyn outside.