Osnabrück with over 170.000 inhabitants is one of the four largest cities in Lower Saxony, alongside Oldenburg of similar size and the larger cities of Hanover and Braunschweig. The exposed location at the junction of old trade routes was an important factor for the foundation of the city. In the Middle Ages, Osnabrück was the principal city of the Westphalian district of the Hanseatic League.
Osnabrück and the minster, 50 km away, became known as the place where the Peace of Westphalia of 1648 was signed. According to Osnabrück, the motto “Peace as a task - committed to peace” still applies today in the context of the peace concept. This should also be made clear by the slogan "Osnabrück - The City of Peace".