the job seems to have started in 1423 or 1424 but this is not certain. the plan of the paintings was to show firstly how sin came into the world through the disobedience of adam and eve. a painting by masolino shows their disobedience in taking fruit from the forbidden tree. a painting opposite it by masaccio shows adam and eve in disgrace, being chased out of the garden of eden. the rest of the paintings show "the life of saint peter". this is because saint peter was the founder of the catholic church and the paintings were meant to show that the best way to know about god's love is through the church.