Münster (German pronunciation: [ˈmʏnstɐ]; Low German: Mönster; Latin: Monasterium) is an independent city in North Rhine-Westphalia, Germany. It is located in the northern part of the state and is considered to be the cultural centre of the Westphalia region. It is also capital of the local government region Münsterland. The city is best known as the location of the Anabaptist rebellion during the Protestant Reformation, as the site of the signing of the Treaty of Westphalia ending the Thirty Years' War in 1648, and as the bicycle capital of Germany.

Münster gained the status of a Großstadt (major city) with more than 100,000 inhabitants in 1915. Currently there are around 270,000 people living in the city, with about 48,500 students, only some of whom are recorded in the official population statistics as having their primary residence in Münster.

In 793, Charlemagne sent out Ludger as a missionary to evangelise the Münsterland. In 797, Ludger founded a school that later became the Cathedral School.Gymnasium Paulinum traces its history back to the school He was ordained as the first bishop of Münster. The first cathedral was completed by 850. The combination of ford and crossroad, market place, episcopal administrative centre, library and school, established Münster as an important centre. In 1040, Heinrich III became the first king in Münster.