Michelangelo
The main reason that Pope Julius' tomb was not finished was that the Pope had an idea for another artwork. The Sistine Chapel near St. Peter's Basilica had its walls painted by some famous artists from Florence. The Pope decided that Michelangelo should paint the ceiling. Michelangelo did not want to. He said that he was not a painter. But the Pope bullied Michelangelo until he agreed to do it. He told the Pope that he would do it "for God" and that he would only do it if the Pope let him paint it "in his own way".