Mainly two types of cities are distinguishable: royal and tributary. While there are differences in terms of the rights of citizens and their wealth, the urban structure is basically the same. The rulers built government buildings (i.e., the castle and town hall), fountains, the parish church, the Maria or Holy Trinity Column, the monastery and a hospital. The most important palaces surround the main squares and market-places. Most baroque cities respected the medieval urban structure, but there are also interesting examples of early urban planning.