In 1501 Michelangelo undertook to make fifteen statues for the Cardinal, _sua manu et opere_. On the death of the Pope in 1503, he consigned four of these fifteen to his heirs--his brothers Giacomo and Andrea Todeschini Piccolomini--to the mutual satisfaction of both parties, and undertook to finish the eleven that remained to do within two years, unless prevented by accident or illness, or by the war concerning Pisa hindering the transport of marble from the mountains of Carrara to Florence. These four statues are apparently the four Saints in the niches on the outer framework of the altar, fine figures somewhat in the style of Donatello's saints outside Or San Michele. Of the remaining eleven, the only one that Michelangelo ever executed is that placed on the top to the left--which is more in his later style. He was somewhat troubled in his mind on the subject in his old age. "Lionardo," he wrote to his nephew, on September 20th, 1561, "I should like you to search among the papers of your father Lodovico, for the copy of a contract _in forma camerae_ made concerning certain figures that I promised to continue for Pope Pius II. [_sic_] after his death; and because the said work, owing to certain differences, remained suspended about fifty years ago, and because I am old, I should like to settle the matter, in order that you may not be troubled about it unjustly after I am gone." In another letter from Rome, on the last day of November, he tells him that the Archbishop of Siena has volunteered to put the thing right for him, "and because he is an excellent and skilful man, I believe that it will end satisfactorily."[90] To the right of the altar is a Risen Christ, with two adoring Angels, over the monument to the Bandini raised by this Archbishop, Francesco Bandini Piccolomini; these figures are also, with some plausibility, ascribed to Michelangelo. The great work in Siena of Pius III. is the famous _Libreria_, which he built as Cardinal for the books and MSS. that his uncle had left him. Probably realising that he had little time left him to live, he wished to erect this monument to his uncle's memory, and indirectly to his own. Above the entrance at the end of the aisle is a fresco of his own elevation to the papacy, painted after his death and after the subsequent completion of the work, by Bernardino Pinturicchio. The Pope's own figure is partly in relief; on either side of him are the Cardinal Giovanni Colonna, who has taken off his mitre, and the Cardinal Giovanni Antonio di San Giorgio, who is placing the papal tiara upon his head. The whole lacks composition, and there is little, if any, attempt at portraiture; but the crowd in the piazza includes some beautiful figures and well rendered motives. A youth in the foreground is evidently Raphael. Under the fresco are Francesco's arms as Cardinal and as Pope. The marble work is by Lorenzo di Mariano, the admirable bronze doors were executed by Antonio Ormanni.[91]