Innocent was, of course, a very powerful Pope, and the historians of Perugia gloat over the fact that he did their city the honour to die in it, devoting whole pages of their books to this important subject. Urban IV. is another remarkable figure in the Church of Rome, and it was during his stay at Perugia that he threw his mighty bomb which was to explode with such disastrous results upon the land of Italy. He was probably staying in the monastery of S. Pietro with his friend S. Thomas Aquinas when he sent the fatal letter which summoned Charles of Anjou down to Rome. "A terrible comet preceded Urban's death which occurred in 1264," says Mariotti. There was a report that Urban had been done to death by eating poisoned figs, but this is unfounded. The Pope lived in constant terror of poison, and by his incessant talk and letters on the subject had infected the minds of those around him. Martin IV. is the last Pope buried in the Duomo. He often came to Perugia, and in 1285 he returned with the full intention of making a considerable stay there. But he died on Easter morning, having eaten a surfeit of eels; (it appears that Martin IV. was greedy of this particular delicacy). Dante records the fact in the "Purgatorio" (canto xxiv.), where Forese points the Pope out seated among the gluttons: " ... e quella faccia Di là da lui, più che l'altre trapunta, Ebbe la Santa Chiesa in le sue braccia: Dal Torso fu: e purga per digiuno L'anguille di Bolsena e la vernaccia." The following inscription is said to have been written over Martin's tomb: "Gaudent anguillae quod mortuus hic jacet ille, Qui quasi morte reas excruciabat eas." Perhaps it was with a view to expiate this very insulting epitaph that the Perugians, in spite of the canons of S. Lorenzo, who refused to contribute to the fund, erected a magnificent tomb for Martin later on. They employed G. Pisano for the purpose, but only a few fragments of his work remain. Mommaggiore pulled it down, as he pulled so many other things, and used its priceless ornaments to adorn his own palace at Porta Sole. The two small pulpits on either side of the high altar screen were made, it is said, from the fragments of the tomb, and also, perhaps, the marble _Pietà_ with the blue background which hangs on the right as you pass back down the church.[62]