St Francis of Assisi is one of the most admired figures of the Middle Ages - and one of the most important in the Christian church, modelling his life on the literal observance of the Gospel and recovering an emphasis on the poverty experienced by Jesus Christ. From 1217 Francis sent communities of friars throughout Christendom and launched missions to several countries, including India and China. The movement soon became established in most cities and several large towns, and, enjoying close relations with the popes, its followers were ideal instruments for the propagation of the reforms of...