 Nyora kupfuurira kweiyi ndima - Mumakumi amakore pashure pokubatwa kweConstantinoplenaMehmed II woUmambo hweOttoman pana 29 May 1453, vamwe vanhu veOrthodox yokuMabvazuva vakanga vachisarudza Moscow seRoma Yechitatu, kana kuti Roma Itsva. 