Middle Ages
By 1150, there were already wooden buildings on the site where Kampen is currently located. The name Kampen, however, is not mentioned until 1277. The city has had city rights since 1236. As a result of its convenient location on the busy trade route between the Zuiderzee and the Rhine, Kampen quickly developed from simple settlements into a prosperous trading town, to become one of the most powerful and leading cities of northwestern Europe. In the 14th century, Kampen exchanged with the bishop of Utrecht, Jan van Arkel, the Mastenbroek polder against the right to increase the IJsseldelta.
The bogging down of the IJssel brought a gradual end to the prosperity of Kampen from 1430 on. For a long time Kampen did not want to sign a union and make economic and political concessions to other cities, as was usual in the Hanseatic League. When the County of Holland went to war with the Hanseatic League this situation came to an end: the city was forced to choose a side in the war. Kampen was originally more oriented toward the Baltic trade and commerce with the hinterland of the Rhine, and therefore in 1441 formally joined the Hanseatic League. The city had much influence in the League; despite loud protests from the other towns in lower reaches of the IJssel and from other Hanseatic cities, the League agreed in 1448 to build a bridge over the river. This project was accomplished in just five months. With this bridge Kampen hoped to be able to develop closer relationships with the hinterland.
Post-Medieval
On 11 August 1572 Kampen was conquered from the Spaniards by Willem van den Bergh, a brother of William of Orange. After the massacre of Zutphen on 15 November, the city voluntarily surrendered to the Spanish. In 1578, the city changed ownership again after theSiege of Kampen, led by George van Lalaing. Due to its right to increase the IJsseldelta,
