Landau was first mentioned as a settlement in 1106. It was in the possession of the counts of Leiningen-Dagsburg-Landeck, whose arms, differenced by an escutcheon of the Imperial eagle, served as the arms of Landau until 1955 [http://www.ngw.nl/int/dld/kreis/landaup.htm]. The town was granted a charter in 1274 by King Rudolf I of Germany, who declared the town a Free Imperial Town in 1291; nevertheless Prince-Bishop Emich of Speyer, a major landowner in the district, seized the town in 1324. The town did not regain its ancient rights until 1511 from Maximilian I. An Augustinian monastery was founded in 1276.