On 12 April 769 the Pope opened the synod in the Lateran Basilica. Present were around 52 bishops (or representatives of bishops), including ones from
Tuscany and
Campania, as well as a large number of priests, deacons, and the laity. The Council met during four sessions, spread over four days, lasting until 15 April. Constantine was brought before the synod, and was asked how he justified his own accession as a layman to the
Apostolic See. Constantine replied that he had been forced to take on the role, as the Roman people had been looking for someone to fix the problems left behind by Pope Paul I. He then confessed to the charges, and threw himself on the mercy of the synod. Infuriated by his arguments, the Synod ordered Constantine to be beaten and
excommunicated from the
Church. The Council then mandated that from the time of the Council onward, the laity could not participate in the election of a pope. Prohibitions were placed upon the presence of armed men, or of soldiers from
Tuscany and the
Campania, during the papal election. Once, however, the election had been held by the clergy, and a pope selected, the Roman army and people were to greet and acknowledge the pope-elect before he was escorted to the
Lateran Palace. The synod decided that the bishops, priests, and deacons whom Constantine had ordained were to once again return to their previous station that they held prior to Constantine's appointment. It confirmed the rulings of the
Council of Rome in 731 concerning the valid use of images. The synod then condemned the
Council of Hieria and anathematized its iconoclastic rulings. Finally, it collected additional texts in support of the veneration of icons, including portions of a letter from the three eastern patriarchs to Pope Paul I. Once the meetings had been concluded, a procession of clergy and people walked barefoot to
St. Peter's Basilica. There, the Council's decrees were announced, anathemas were invoked, condemning any who violated the decrees, and both were written up for exposition to the people. ==Immediate outcome and long-term effects==