ハールィチ・ヴォルィーニ大公国
In the 5th century, the first Slavs appeared in the area, which is confirmed by numerous archaeological findings. Most probably, Rzeszów was then inhabited by the Vistulans. Sometime between 11th and 13th century the town was conquered and subsequently annexed by the East Slavic Ruthenians. Polish princes of the Piast dynasty annexed it in 1264 and in Tarnów, there was a meeting of Prince Bolesław V the Chaste, and Prince Daniel of Kingdom of Galicia–Volhynia, during which both sides agreed that the border would go between Rzeszów and Czudec (Rzeszów belonged to Kingdom of Galicia–Volhynia, while Czudec and Strzyżów to Lesser Poland).