a journey to Constantinople and arranged to marry Princess Anna, the sister of Byzantine emperor Basil II. Historically, it is more likely that he adopted Byzantine Christianity in order to strengthen his diplomatic relations with Constantinople. Vladimir's choice of Eastern Christianity may have reflected his close personal ties with Constantinople, which dominated the Black Sea and hence trade on Kiev's most vital commercial route, the Dnieper River. According to the Primary Chronicle, Volodymyr was baptised in 987, and ordered the population of Kyiv to be baptised in August 988. The greatest resistance against Christianisation appears to have occurred in northern towns including Novgorod, Suzdal, and Belozersk. Adherence to the Eastern Church had long-range political, cultural, and religious consequences. The church had a liturgy written in Cyrillic and a corpus of translations from Greek that had been produced for the Slavic peoples. This literature facilitated the conversion to Christianity of the Eastern Slavs and introduced them to rudimentary Greek philosophy, science, and historiography without the necessity of learning Greek (there were some merchants who did business with Greeks and likely had an understanding of contemporary business Greek). In contrast, educated people in medieval Western and Central Europe learned Latin. Enjoying independence from the Roman authority and free from tenets of Latin learning, the East Slavs developed their own literature and fine arts, quite distinct from those of other Eastern Orthodox countries. (See Old East Slavic language and Architecture of Kievan Rus for details). Following the Great Schism of 1054, the Rus' church maintained communion with both Rome and Constantinople for some time, but along with most of the Eastern churches it eventually split to follow the Eastern Orthodox. That being said, unlike other parts of the Greek world, Kievan Rus' did not have a strong hostility to the Western world. Golden age Yaroslav, known as "the Wise", struggled for power with his brothers. A son of Vladimir the Great, he was prince of Novgorod at the time of his father's death in 1015. Subsequently, his eldest surviving brother, Svyatopolk the Accursed, according to domestic but not foreign sources, killed three of his other brothers and seized power in Kiev. Yaroslav, with the active support of the Novgorodians and the help of Viking mercenaries, defeated Svyatopolk and became the grand prince of Kiev in 1019. Although he first established his rule over Kiev in 1019, he did not have uncontested rule of