Giotto, The Last Judgment, 1306, Cappella Scrovegni (Arena Chapel), Padua
Giotto was also a free thinker. You get the impression that Padua was the destination of Christian pilgrims because of Giotto's philosophy. Most of Giotto's paintings look like they have been completed or finished by other people and due to the vast number of churches he painted frescos in, he could not have physically painted them all himself.
Giotto, Crucifix, c. 1310-1317, Tempio Malatestiano, Rimini