in the church of santa croce, a series of frescoes painted around 1320 were to have a revolutionary effectn florentine painting. here, the great merchant families competed with one another to commission the leading artists to decorate their chapels. in the chapel of the bardi family, professor john white of university college, london, describes how these medieval images came to life. this is a franciscan church, and the franciscans were the passionate preachers of the late medieval world. they used their words to tug at the emotions of the faithful. and at the same time, the painters increasingly tried to bring the gospels and the stories of the saints to life before their very eyes. at first, as you can see in this late 13th century saint francis altarpiece, they did it with stiff, imposing figures and with bright, doll-like symbolic scenes and images. and here next door in a much-ruined fresco, i'm afraid, painted probably only 30 or 40 years later, you can see the revolution represented by the art of giotto, the great contemporary of the poet dante. here is a new soft, warm reality, a n