This special cover from Germany celebrates the 20th anniversary of the inscription of Stralsund and Wismar as a Wordl Heritage Site. The
Historic Centers of Stralsund and Wismar are inscribed as UNESCO world hertitage sites since 2002. The two towns were major Hanseatic League trading centres in the 14th and 15th centuries. They then served as defensive and administrative centres for Sweden two hundred years later, notably during the Thirty Years' War. The architectural styles from both of these periods remain and are well-preserved.
