In 1137 by the agency of Emperor Lothair III of Supplinburg the rivals finally concluded a peace treaty by which Bolesław ceded all claims to the land of Kladsko to Soběslav.

In 1310 Count John the Blind from the House of Luxembourg by marriage inherited Bohemia and again granted Kladsko for life to the Piast dukes Henry VI the Good from 1327 to 1335 and Bolko II of Ziębice from 1336 to 1341.

The town developed rapidly until the start of the Hussite Wars in the 15th century, which left Kladsko depopulated by plagues, partially burnt, and demolished by several consecutive floods.

In 1458 King George of Poděbrady, with the consent of Emperor Frederick III of Habsburg, elevated Kladsko to a county (hrabství Kladské), held by his second son Viktorin, who thereby received the status of an Imperial count (Reichsgraf).

Under his Poděbrad successors it still remained an integral part of Bohemia as an "outer region" (vnější kraj) south of the adjacent Silesian province.

Kladsko had joined the Protestant Bohemian Estates and even after the defeat at the Battle of White Mountain in 1620 refused to submit to Emperor Ferdinand II of Habsburg.

It was not until 1818, when King Frederick William III finally incorporated the County into the Prussian Province of Silesia, although Czech and Austrian influence is still evident in the architecture and culture of the region.