Kingdom of Galicia–Volhynia
In the following century, the area shifted to Poland in 1018–1031, then back to Kievan Rus' and in 1069–1080 back to Poland. From 1080 until 1349 this region was part of Kievan Rus or the Kingdom of Galicia–Volhynia. During this time Polish settlers helped to economically develop the region and they formed a significant element in the courts of the Galician rulers.