Střekov Castle was built in the early 14th century in order to guard the transport of goods along the Labe, the river it overlooks. John of Luxemborg gave the land to Pešek of Veitmile on the condition that he would build a castle to guard the taxable goods that floated up and down the river. When the castle was completed it was then sold to the Vartenberg family. The castle exchanged hands many times in the 15th century, as well as endured many structural changes, until the Lobkowicz family came into possession of it. The Lobkowicz family maintains ownership of the castle currently.