 These missions tended to found monastic institutions and collegiate churches that served large areas.Partly as a result of these factors, some scholars have identified a distinctive form of Celtic Christianity, in which abbots were more significant than bishops, attitudes to clerical celibacy were more relaxed, and there were some significant differences in practice with Roman Rite, particularly the form of tonsure and the method of calculating Easter, although most of these issues had been resolved by the mid-seventh century.After the reconversion of Scandinavian Scotland from the tenth century, Christianity under papal authority was the dominant religion of the kingdom.