What three areas of Europe to which Christianity spread between 476 and 1050?

Between 476 and 1050, Christianity spread significantly in several areas of Europe, notably in the British Isles, where missionaries like St. Augustine played a key role; in Scandinavia, where efforts by figures such as St. Ansgar sought to convert the Norse peoples; and in Eastern Europe, particularly in regions like the Slavic territories, where Christianization efforts were led by both Byzantine missionaries such as Saints Cyril and Methodius. This period saw the establishment of churches and the integration of Christian practices into local cultures.