How the Hanseatic League Built a Medieval Trade Empire

The Hanseatic League, a medieval commercial alliance of German merchant towns, rose to dominate Baltic and North Sea trade from the 13th to the 15th century. Originating from merchant associations called 'Hanse' formed to protect against pirates and feudal lords, the League evolved into a powerful network of over 100 cities. Key to its success was the strategic city of Lübeck, which allied with Hamburg in 1241 and later expanded to include Cologne, Rostock, and Wismar. The League established trading posts (kontore) in Novgorod, London, Bruges, and Bergen, and developed the cog, an efficient cargo ship. Its policies included embargoes and blockades, such as the 1368 blockade of Norway, and military actions like the war against Denmark, culminating in the Treaty of Stralsund (1370). The League's decline began in the 15th century due to internal conflicts, competition from Nuremberg and Augsburg, the rise of nation-states, and the shift of trade to western Europe. The last diet was held in 1669 in Lübeck with only six cities represented.