Hanseatic League

Timeline

1. 1200–1240Baltic coast · Baltic SeaPort cities such as Lübeck and Hamburg formed a complementary trading network along the Baltic–North Sea routes, laying the economic and institutional groundwork for a formal alliance.
2. 1241Lübeck · LübeckLübeck and Hamburg concluded a mutual-aid and trade-route protection pact, agreeing to joint defense against pirates, coordinated tariffs, and mutual judicial assistance; traditionally regarded as the founding event of the Hanseatic League.
3. 1241–1400Hanseatic trade route network · North SeaMore North German and Baltic cities joined the league; regular Hanseatic Diets coordinated diplomacy, trade routes, and maritime policy, while trading posts (Kontore) spread across Novgorod, London, Bruges, and elsewhere.
4. 1400–1669Lübeck · LübeckAfter reaching its zenith in the 15th century, the league gradually declined due to the shift of routes in the Age of Discovery, the centralization of northern states, and internal competition among cities; after the last Hanseatic Diet in 1669 it survived in name only.