Peremyshl was ruled initially by the descendants of
Vladimir Yaroslavich — who had helped recapture the towns of Cherven Rus in 1031 — and his only son
Rostislav Vladimirovich; they are hence known as the
Rostislavichi. The earliest known
Prince of Peremyshl is Ryurik Rostislavich, who was occupying the city when the murderers of
Yaropolk Izyaslavich fled to him in 1087.
Vsevolod I Yaroslavich, Grand Prince, is alleged to have apportioned three south-western principalities, distributing Vladimir-in-Volhynia (modern
Volodymyr-Volynskyi) to Davyd Igorevich,
Terebovl to Vasilko Rostislavich and Peremyshl to
Volodar Rostislavich, grants confirmed at the
Council of Liubech of 1097. The city, defended by Prince Volodar, was besieged in 1097 by
Yaroslav Svyatopolkovich, allied to King
Coloman of Hungary. However
Davyd Svyatoslavich,
Prince of Chernigov, and his
Polovtsy ally
Bonyak defeated the Hungarian. In 1141, it was united with the
Principality of Terebovlia and
Principality of Zvenyhorod to form the enlarged
Principality of Halych, but was later on several occasions awarded to or seized by various members of the ruling dynasty. Peremyshl was often affected by frequent dynastic struggles in the Principality of Halych, and the neighboring
Principality of Volhynia, particularly during the first half of the 13th century, when both Polish and Hungarian rulers also tried to expand their influences over the region. Thus in the autumn of 1219, Peremyshl was captured by Polish forces during the combined Polish-Hungarian campaign aimed at securing the entire Halychyna for the
Hungarian prince
Coloman, who was styled as
King of Galicia. In 1224, Coloman's brother, prince
Andrew of Hungary, became the Prince of Peremyshl, and in 1227 also the Prince of Halych. During the conflict between
Rostislav Mikhailovich and
Daniil Romanovich (formerly its prince), it was one of the former's strongholds; its bishop supported Rostislav, and when Rostislav occupied
Halych, he appointed
Konstantin of Ryazan to oversee Peremyshl. Peremyshl is known to have been the main fort of
Boleslaw-Yuri,
King of Rus, going into Polish hands after his death. ==List of princes==