Byzantine missionaries had been working in the Balkans, particularly in Bulgaria, and they must have had some effect in Russia. Thus, one should not view the conversion as a sudden event.

• 拜占庭传教士使团曾经在巴尔干地区，特别是在保加利亚，进行过传教活动。他们一定对罗斯人有一定影响。因此，不应把罗斯人的皈依看成是一个非常突然的事情。