Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
It reached its summit in its victories over Waldemar IV of Denmark, gaining in the Treaty of Stralsund a virtual monopoly in Scandinavia, but its hegemony was curbed by a Dutch defeat in 1441. The last diet was held in 1669, but this group never formally dissolved. Originating in a treaty between Lbeck and Hamburg in 1241, its goal was to obtain mutual security and exclusive trading rights for its members. FTP, identify this medieval German mercantile league.
A:
History