query: noble_family sviatoslav i of kiev
supports: The Rurik dynasty or Rurikids was a dynasty founded by the Varangian prince Rurik, who established himself in Novgorod around the year AD 862. The Rurikids were the ruling dynasty of Kievan Rus' (after 862), as well as the successor principalities of Galicia-Volhynia (after 1199), Chernigov, Vladimir-Suzdal, and the Grand Duchy of Moscow, and the founders of the Tsardom of Russia. They ruled until 1598 and the Time of Troubles, following which they were succeeded by the Romanovs. They are one of Europe's oldest royal houses, with numerous existing cadet branches. Kievan Rus' (, ) was a loose federation of East Slavic tribes in Europe from the late 9th to the mid-13th century, under the reign of the Rurik dynasty. The modern peoples of Belarus, Ukraine, and Russia all claim Kievan Rus' as their cultural ancestors. Sviatoslav I Igorevich ( Old East Slavic :  ~  /   , Sventoslav / Svantoslav Igorevi ; Old Norse : Sveinald Ingvarsson ; Russian :   , Sviatoslav Igorevich ; Ukrainian :   , Sviatoslav Ihorovych ; Belarusian :   , Sviatasla Iharavich ; Bulgarian :  , Svetoslav , Greek :  , Sphendosthlabos ) ( c. 942 -- March 972 ) , also spelled Svyatoslav , Grand prince of Kiev . The son of Igor of Kiev and Olga , Sviatoslav is famous for his persistent campaigns in the east and south , which precipitated the collapse of two great powers of Eastern Europe , Khazaria and the First Bulgarian Empire . He also conquered numerous East Slavic tribes , defeated the Alans and attacked the Volga Bulgars , and at times was allied with the Pechenegs and Magyars . His decade - long reign over the Kievan Rus ' was marked by rapid expansion into the Volga River valley , the Pontic steppe , and the Balkans . By the end of his short life , Sviatoslav carved out for himself the largest state in Europe , eventually moving his capital in 969 from Kiev ( modern - day Ukraine ) to Pereyaslavets ( identified as the modern village of Nufru , Romania ) on the Danube . In contrast with his mother 's conversion to Christianity , Sviatoslav remained a staunch pagan all of his life . Due to his abrupt death in ambush , his conquests , for the most part , were not consolidated into a functioning empire , while his failure to establish a stable succession led to a fratricidal feud among his sons , resulting in two of his three sons being killed . Rurik or Riurik (from "Rørik"; 830  879) was a legendary Varangian chieftain who gained control of Ladoga in 862, built the Holmgard settlement near Novgorod, and founded the Rurik Dynasty, which ruled Kievan Rus (and later the Grand Duchy of Moscow and Tsardom of Russia) until the 17th century.
candidates: rurik rurik dynasty
answer: rurik dynasty