銀山
At this point the Premyslids were at the peak of their power. The strong international position of the Bohemian state in the 13th and at the beginning of the 14th century was closely related to the economic boom. However, without substantial reserves of precious minerals, the last Premyslids did not achieve significant successes. The Bohemian provinces were famous for their silver, and a silver mining boom started just before the middle of the 13th century after the discovery of rich deposits near Jihlava. Silver mining brought many people to the area, and many temporary huts and pubs were built by and for the people who went there hoping to find their fortune. As late as 1270 Jihlava was awarded a building order by Ottokar II in order to expand the town according to its needs. A set of legal regulations, the first of such regulations for a mining town in Central Europe, were drawn up in relation to silver mining in the Jihlava and Havlíčkův Brod regions, and miners from German-speaking Saxony, Harz, and Tirol settled in Jihlava (German: Iglau) and Havlíčkův Brod (German: Deutsch-Brod). The inflow of skilled German labourers allowed the subsequent expansion of power for the Czech kings.