The Hanseatic League, commonly called The Hansa, was a medieval commercial and defensive network of merchant guilds and market towns in Central and Northern Europe. Growing from Lübeck and a few other North German towns in the late 12th century, the League expanded between the 13th and 15th centuries and ultimately encompassed nearly 200 settlements across eight modern-day countries, ranging from what became Estonia and Russia in the northeast to the Netherlands in the west, and extended inland as far south as Cologne.