Giotto
Note: while reproductions of paintings at external sites are valuable, attributions may be misleading. Any website that shows, without question, the frescoes of the Upper Church of St. Francis of Assisi as being the work of Giotto, is ignoring modern scholarship on the matter. Any website that claims Giotto was placed in charge of the decoration of the Upper Church or was selected as the "most suitable" artist for its decoration is making a claim based on lack of evidence.