<P> Then he sent a delegation to meet the Easterners at Constantinople . The delegates set out bearing two letters, one from Pope Agatho to the Emperor, and the other from the bishops of the Rome synod to those gathered in Constantinople . </P> <P> In the meantime, Constantine summoned Patriarch George I of Constantinople and all bishops of his jurisdiction of Constantinople to a council . He also summoned Patriarch Macarius of Antioch, a Byzantine appointee permanently resident in Constantinople because of the Muslim occupation of his see . </P> <P> On 7 November 680, a mere 37 bishops and a number of presbyters convened in the imperial palace, in the domed hall called the Trullus . The Patriarchs of Constantinople and of Antioch participated in person, whereas the patriarchates of Alexandria and Jerusalem were represented by Byzantine appointees (because of the Saracen Muslim conquest there was at this date no patriarch in either of these sees). The Pope and a council he had held in Rome were represented (as was normal at eastern ecumenical councils) by a few priests and bishops . In its opening session, the council assumed the authority of an Ecumenical Council . The Emperor attended and presided over the first eleven sessions, took part in the discussions and returned for the closing session on 16 September 681, attended by 151 bishops . </P> <P> During the council, a letter by Pope Agatho was read which asserted as the traditional belief of the Church that Christ was of two wills, divine and human . Most of the bishops present accepted the letter, proclaiming that Peter spoke through Agatho, though ironically this council also proclaimed another historical pope as anathema . Macarius of Antioch defended monothelitism but was condemned and deposed, along with his partisans . The council, in keeping with Agatho's letter, defined that Jesus Christ possessed two energies and two wills but that the human will was' in subjection to his divine and all - powerful will' . The council carefully avoided any mention of Maximus the Confessor, who was still regarded with suspicion . It condemned both monoenergism and monothelitism as heretical and included those who had supported this heresy, including Pope Honorius I and four previous patriarchs of Constantinople . When the council had concluded, the decrees were sent to Rome where they were accepted by Agatho's successor, Pope Leo II . </P>

Where was the third council of constantinople held