Throughout Sweden's history, walls were created in Stockholm to defend the city from attacks. These defensive walls were modified throughout the 13th to the 16th century. In 1625, the Great Stockholm Fire of 1625 destroyed the southwestern section of Stadsholmen, an island in the center of Stockholm. The amount of destruction led to the beginning of the demolition of the Stockholm walls. Today, most of the younger city walls cannot be found anywhere above ground. However, parts of the northern city walls are preserved in the Museum of Medieval Stockholm.