It included the towns of Bolesławiec, Bolków, Gryfów, Kamienna Góra, Lubawka, Lwówek, Świerzawa, from 1278 also Wleń,[4] and from 1319 also Zgorzelec, Lubań, Trzebiel, Żary, Mirsk, Leśna, Zły Komorów, Żytawa, Ostrowiec and Rychbach.

When Bolesław's eldest son Henry V the Fat succeeded his father as Duke of Legnica in 1278, he gave the Jawor subdivision to his younger brothers Bolko I the Strict and Bernard the Lightsome.

After his death in 1301, his sons finally divided their territories in 1312: the lands around Świdnica and Ziębice were again split off into separate duchies, while Jawor was ruled by Duke Henry I.

In 1319, Henry I expanded the duchy to the west and northwest, and acquired the towns of Zgorzelec, Lubań, Trzebiel, Żary, Mirsk, Leśna, Zły Komorów, Żytawa, Ostrowiec and Rychbach.

[9] On 27 July 1320, Henry I entered an alliance with Wartislaw IV, Duke of Pomerania in attempt to retain Lubusz Land and capture the towns of Strausberg and Wriezen.