The arms are known since 1501 as the composition appears on the oldest known seal. The antler is taken from the arms of Württemberg, the pillow (or Pfühl) is a canting element. At first the field was red. Later in the 17th century the antler was placed separately in a head. After the granting of city rights in 1699, the colour was changed into blue. The head was again removed in 1934 when the present arms were granted.