Under Vilém of Landštejn their estates, as well as the castle and Nová Bystřice, included Třeboň, Lomnice and Nové Hrady.

He was also on friendly terms with King Charles IV, who supported him in his violent conflict with his distant relative, Jindřich of Hradec.

In 1579, the last member of the Krajíř family, Anna Roupovská, sold Landštejn to Stěpán of Eincing, and there were then several owners in quick succession.

In 1771, lightning struck one of the towers and the castle was burnt out, and fell into ruin, providing building material for the local population.

The lofty Renaissance palace of the Krajíř family and Baroque artillery bastions ended the building styles carried out in four stages of development.