After the required ten days had passed, the Cardinals assembled on the Vigil of St. Agnes (20 January) to hear the customary Mass of the Holy Spirit. There were twelve cardinals present. Two cardinals, Simon de Brion, who was Papal Legate in France, and Giovanni Gaetano Orsini, did not attend. The next morning, 21 January, Cardinal Petrus was the unanimous choice of the electors, on the first ballot (scrutiny). Peter of Tarantaise was the first Dominican to become Pope. He chose the pontifical name of "Innocent". His decision was to be crowned in Rome, which had not seen a pope since the departure of Gregory X in the third week of June, 1272. By 7 February the Papal Curia had reached Viterbo. King Charles of Naples rode up to Viterbo to meet the new Pope and escort him to Rome. On 22 February 1276, the Feast of S. Peter's Chair, he was crowned at the Vatican Basilica by Cardinal Giovanni Gaetano Orsini.