Original: The black-and-golden bars in the bottomleft are the symbol of Saxony, and symbolize that the area around Belzig, Brück, Wiesenburg and Niemegk belonged to Saxony until 1815.
Simplified: The black-and-golden bars in the bottomleft are the symbol of Saxony, and show that the area around Belzig, Brück, Wiesenburg and Niemegk belonged to Saxony until 1815.