It would fill a book to tell of all the work which Michelangelo did; but although he began so much, a great deal of it was left unfinished. If he had lived in quieter times, his work would have been more complete; but one after another his patrons died, or changed their minds, and set him to work at something else before he had finished what he was doing. The great tomb which Pope Julius had ordered him to make was never finished, although Michelangelo drew out all the designs for it, and for forty years was constantly trying to complete it. The Pope began to think it was an evil omen to build his own tomb, so he made up his mind that Michelangelo should instead set to work to fresco the ceiling of the Sistine Chapel. In vain did the great sculptor repeat that he knew but little of the art of painting. 'Didst thou not learn to mix colours in the studio of Master Ghirlandaio?' said Julius. 'Thou hast but to remember the lessons he taught thee. And, besides, I have heard of a great drawing of a battle-scene which thou didst make for the Florentines, and have seen many drawings of thine, one especially: a terrible head of a furious old man, shrieking in his rage, such as no other hand than thine could have drawn. Is there aught that thou canst not do if thou hast but the will?' And the Pope was right; for as soon as Michelangelo really made up his mind to do the work, all difficulties seemed to vanish. It was no easy task he had undertaken. To stand upright and cover vast walls with painting is difficult enough, but Michelangelo was obliged to lie flat upon a scaffolding and paint the ceiling above him. Even to look up at that ceiling for ten minutes makes the head and neck ache with pain, and we wonder how such a piece of work could ever have been done. No help would the master accept, and he had no pupils. Alone he worked, and he could not bear to have any one near him looking on. In silence and solitude he lay there painting those marvellous frescoes of the story of the Creation to the time of Noah. Only Pope Julius himself dared to disturb the master, and he alone climbed the scaffolding and watched the work. 'When wilt thou have finished?' was his constant cry. 'I long to show thy work to the world.' 'Patience, patience,' said Michelangelo. 'Nothing is ready yet.' 'But when wilt thou make an end?' asked the impatient old man. 'When I can,' answered the painter. Then the Pope lost his temper, for he was not accustomed to be answered like this. 'Dost thou want to be thrown head first from the scaffold?' he asked angrily. 'I tell thee that will happen if the work is not finished at once.' So, incomplete as they were, Michelangelo was obliged to uncover the frescoes that all Rome might see them. It was many years before the ceiling was finished or the final fresco of the Last Judgment painted upon the end wall.