Complex sentence: From the second half of the 13th century, the individual Hanseatic cities created various banners to distinguish themselves from other member cities, the oldest Hanseatic flag is the plain red banner used by Hamburg.
Split into simpler sentences: From the second half of the 13th century, the individual Hanseatic cities created various banners to distinguish themselves from other member cities. The oldest Hanseatic flag is the plain red banner used by Hamburg.