Duchy of Nysa
The 1290s were also a period of difficult relations with the neighboring Kingdom of Bohemia. It's unknown why relations between them altered, but this could be probably thanks to the willingness of the Duke of Jawor-Świdnica. Bolko I, in order to secure his domains, began the intensive building of fortifications in his Duchy (particularly in the Bohemian frontier towns of Świdnica, Wleń, Strzegom and Kamienna Góra). After this, Bolko I tried to take full control over the Duchy of Nysa-Otmuchów, given to the Bishopric of Wroclaw in Henry IV's will.