21 But if Boniface was the special apostle of Germany, nevertheless the zeal which burned within him for spreading the kingdom of heaven did not halt at the borders of that nation. The Church of Gaul, which from apostolic times had so generously embraced the Catholic faith, had sealed its faith with the blood of innumerable martyrs, and after the establishment of the Frankish empire, had written into the annals of Christendom pages worthy of the highest praise, at the time of St. Boniface was greatly in need of moral reform and the restoration of Christian life. For many dioceses were either without bishops or entrusted to unworthy ones; elsewhere superstitions of all kind, heresies and schisms brought disquiet to many consciences; with lamentable negligence long periods of time elapsed without any Church Councils being called, so necessary for preserving the purity of the faith, for restoring the discipline of the clergy, for reforming public and private morality. Very often consecrated ministers of religion did not measure up to the lofty dignity of their office; and often the people lay helpless in the toils of corrupt morality and an egregious ignorance of the sad state of affairs reached the ears of St. Boniface; no sooner did he learn that the illustrious Frankish Church was imperiled than he set about applying a remedy with energy and skill.
Source: Ecclesiae Fastos (Vatican.va)