as longer pikes and the extensive use of artillery, and they built up a formidable navy. However, in the early fifteenth century one of the best armed and largest Scottish armies ever assembled still met with defeat at the hands of an English army at the Battle of Flodden in 1513, which saw the destruction of a large number of ordinary troops, a large section of the nobility and the king, James IV. Religion Christianity was probably introduced to what is now lowland Scotland from Roman soldiers stationed in the north of the province of Britannia. It is presumed to have survived among the Brythonic enclaves in the south of modern Scotland, but retreated as the pagan Anglo-Saxons advanced. Scotland was largely converted by Irish-Scots missions associated with figures such as St Columba from the fifth to the seventh centuries. 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 was some significant differences in practice with Roman Christianity, 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. In the Norman period the Scottish church underwent a series of reforms and transformations. With royal and lay patronage, a clearer parochial structure based around local churches was developed. Large numbers of new foundations, which followed continental forms of reformed monasticism, began to predominate and the Scottish church established its independence from England, developed a clearer diocesan structure, becoming a "special daughter of the see of Rome", but lacking leadership in the form of archbishops. In the Late Middle Ages the problems of schism in the Catholic Church allowed the Scottish Crown to gain greater influence over senior appointments and two archbishoprics had been established by the end of the fifteenth century. While some historians have discerned a decline of monasticism in the Late Middle Ages, the mendicant orders of friars grew, particularly in the expanding burghs, to meet the spiritual needs of the population. New saints and cults of devotion also proliferated. Despite problems over the number and