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It appears that the Rus dominated the trade routes between northern Europe and the Black Sea and that their merchants acted as middlemen specifically in the fur trade. It also appears that Rus merchants often visited the spectacular city of Byzantium. However, the Byzantines preoccupied with the Bulgars and the Arab threats paid little attention to the growing power of Rus. However, this was to change This changed in 860 when the Rus raided the environs of Byzantium before being beaten back. In 941, the Rus threatened the Christian Empire with invasion, but a peace agreement prevents prevented war.<ref>, John Julius Norwich. Byzantium, The Apogee (London, Penguin Books, 1992), p 145</ref>. This treaty led to the development of more trade with Byzantium and it appears that encouraged Christians missionaries began to follow the merchants into Russia and brought bring the Gospel to the people of the Steppe. However, in 970 A.D under Grand Prince Sviatoslav, the Rus after conquering the Bulgar Empire invaded Byzantium. It took two years of hard fighting for the Byzantines to defeat the Rus. All the time it appears that Byzantine cultural and religious influence spread in Kievan Rus. It seems that a mother of a Grand Prince, Olga was baptized by Byzantine missionaries. The Grand Princess Olga ruled as regent for her son Sviatoslav, however despite his mothers’ influence he remained an avowed pagan. Christianity was slowly growing in Rus, but it remained overwhelmingly pagan <ref>Norwich, p 67</ref>. This was to change in around 1000 AD when Emperor Basil II and Grand Prince Vladimir of Kiev (958-1015 AD) came to an arrangement. The Rus leader agreed to support Basil in his civil war with a rebel in return for the hand of his sister in marriage. As part of this bargain, Vladimir agreed to convert to Greek Orthodox Christianity. Vladimir under the influence of his wife became a zealous Christian and the Grand Prince personally tossed pagan idols into a river<ref>Norwich, p 71</ref>. The Grand Prince is today recognized as a saint in the Orthodox Church. It is widely believed that Vladimir used the Christian Church to unify his realm. Like many other ‘state-builders’ Vladimir used religion to extend his own power and to discipline his people. After the death of Vladimir, the Kiev Rus state flourished for several more decades until the Empire began to fragment because of a series of succession disputes. Interactions between the Byzantine Empire and the various Russian states that emerged in the wake of the fall of the Rus continued for some centuries but was interrupted by the Mongols conquest of the Russian principalities.