Altenburg (Reutlingen), The county of Reutlingen
In 1896, a certain Eugen Nägele was able to excavate sections of the wall on behalf of the so-called Reichslimeskommission, which formed a rectangle as big as 120 x 100 meters. Until then, due to accompanying finds that have been lost today, it was believed to be a Roman complex, but Eugen Nägele identified the remains as a Franconian castle, which gave the village its name (“Altinburc”). More recent historical research has shown, that the Altenburg might have been part of the Oferdinger Königshof, meaning that, spread across two locations, there were a church, a farmyard and fortifications. It is unclear where the main building, the so-called palas, was situated. In 914, both cities consequently were the scene of a trial, with King Conrad I aimed to banish the Swabian Duke Erchangar. Because the Duke continued to resist Conrad’s claims to power, he was beheaded in 917. For the 10th and 11th century there is no evidence proving the castle’s existence. Only in the year of 1135, the Zwiefalter Chronicle mentions a place called Altenburg, whose name is traced back to “a castle, which was built a long time ago.” The chronicle also reports that Kuno and Liutold of Achalm initially considered Altenburg to be the location of their monastery, which was built in Zwiefalten.