Prince Igor Sviatoslavich the Brave or Ihor Sviatoslavych (Old East Slavic: Игорь Святъславичь, Igorĭ Svjatŭslavičĭ; , Igor Svyatoslavich; , Ihor Svyatoslavych; Old Norse: Ingvar Sveinaldsson) (Novhorod-Siverskyi, April 3/10, 1151 – the spring of 1201/December 29, 1202) was a Rus’ prince (a member of the Rurik dynasty). His baptismal name was Yury. Igor was prince of Putivl (1164–1180), of Novgorod-Seversk (1180–1198), and of Chernigov (1198–1201/1202). Chronicle evidence reveals that he had an enviably successful military career; he led many campaigns against the Cumans from among which the chronicles report only one defeat. But it was his defeat at the river Kayala (the exact location of which has never been definitively established) that has become immortalized through its literary rendering in “The Lay of Igor’s Campaign”, the most celebrated epic of Rus’. During his reign Novhorod-Siverskyi enjoyed the status of the second most powerful town in the Chernigov land. Basing their observations on archaeological evidence, a number of investigators proposed that Igor built the Cathedral of the Holy Savior in the Monastery of the Transfiguration outside of the town. It has also been suggested that he founded the stone church in Putivl. To judge from circumstantial evidence, Igor's reign in Chernigov (now Chernihiv in modern Ukraine) was uneventful. He continued the family chronicle that his father and brother had commissioned. His early life Igor was the elder son of Svyatoslav Olgovich, by his second wife, the Novgorodian Catherine. By giving the child the baptismal name of Yury, Svyatoslav Olgovich acknowledged his friendship with prince Yury Vladimirovich of Suzdal. In choosing Igor for the boy's princely name, he testified to the close bond that had existed between him and his deceased brother. When Sviatoslav died on February 15, 1164, Igor's older half-brother, Oleg Svyatoslavich, took over the control of Novgorod Severskiy and probably gave Putivl to Igor. Before 1170, Igor married a daughter of prince Yaroslav Volodymyrkovych Osmomysl of Halych. Around June 1171, the Cumans renewed their raids along the Ros River and they attacked towns belonging to the Olgovichi (the ruling dynasty of Chernigov). Igor led a campaign against the invaders on June 29. After crossing the river Vorskla, he learnt that Khans Kobyak and Konchak were devastating districts around Pereyaslavl (now Pereiaslav in Ukraine); he crossed back over the river and rode to confront the raiders. On July 20, his druzhina killed many of the nomads and took others captive. While