Fra Angelico (c. 1400-55) is one of the most popular artists of the early Italian Renaissance. In his own lifetime churches and cathedrals competed for his work, and the style he evolved has come to be regarded as the natural language of religious painting. For more than a century the popular image of an angel has been that of an angel by Fra Angelico. Perhaps his best known work is the series of fresco decorations in the convent of San Marco...