Duchy of Jawor
The area was settled in the course of the clearing of the former Silesian Przesieka borderland. A place called "Salzborn" was first mentioned in a 1221 deed, from the 14th century two settlements, "Nieder" ("Lower") and "Ober" ("Upper") "Salzbrunn" are documented. The parish church and a hospital at "Nieder Salzbrunn" were probably established by the Piast duke Henry I the Bearded after 1200, benefitting from the healing spring at "Ober Salzbrunn" first mentioned in 1385. As a result of the fragmentation of Poland into smaller duchies, it was part of the Duchy of Silesia and later the Duchy of Jawor. Together with the Silesian Duchy of Jawor-Świdnica it fell to the Bohemian Crown after the death of Duke Bolko II the Small in 1368, held by his widow Agnes of Habsburg until 1392.