 In contrast to Zuckerman 's version , the Primary Chronicle and the later Kiev Chronicle place Oleg 's grave in Kiev , where it could be seen at the time of the compilation of these documents . Furthermore , scholars have pointed out that if Oleg succeeded Rurik in 879 ( as the East Slavic chronicles assert ) , he could hardly have been active almost 70 years later , unless he had a life @-@ span otherwise unheard of in medieval annals . To solve these difficulties , it has been proposed that the pagan monarch @-@ priests of Rus ' used the hereditary title of helgu , standing for " holy " in the Norse language , and that Igor and others held this title . 
