The House of Přemysl was a royal dynasty that ruled over the Czech lands from the 9th to the 14th centuries. It is one of the oldest noble families in Central Europe and played a significant role in the formation of the Czech state. The dynasty is known for its contributions to the development of Prague and the establishment of the Czech monarchy. Notable members of the House of Přemysl include Wenceslaus I, the patron saint of Bohemia, and Charles IV, who became Holy Roman Emperor. The dynasty's influence waned in the 14th century, leading to the rise of other noble families in the region.