74. St. Martin I:
July 5, 649 - September 16, 655 (3 years, 11 months)
Martin I was highly respected for his learning and one of his first acts as pope was to convene a synod at the Lateran palace to address the Monothelite controversy. At this time the Monothelite doctrines and followers were all condemned.
75. St. Eugene I:
August 10, 654 - June 2, 657 (2 years)
The reign of Pope Eugene I was characterized by his great deference towards the secular ruling powers. He only ascended to the papal throne after emperor Constans exiled his predecessor, Pope Martin I, and Eugene displayed no overt acts of defiance against either Constans or against the patriarchs of Constantinople.
76. St. Vitalian:
657 - January 27, 672 (14 years)
Pope Vitalian's reign was most concerned with trying to achieve a political and religious reconciliation between Rome and Constantinople over the dispute about Monotheletism. He was not successful, so the conflict continued to divide East and West.
77. Adeodatus II:
April 11, 672 - June 17, 676 (4 years)
Pope Adeodatus II was already an elderly man when he was elected pope and, even though he reigned for four years, not a great deal was accomplished during his pontifficate.
78. Donus:
November 2, 676 - April 11, 678 (1 year)
Not a great deal is reliably known about Pope Donus, but according to the Liber Pontificalis he was reasponsible for embarking on a number of constructoin and repair projects both in and around Rome.
79. St. Agatho:
June 27, 678 - January 10, 681 (2 years)
Pope Agatho was finally able to settle the controversy over Monotheletism with Emperor Constantine IV at the Third Council of Constantinople, which met from 680 through 681.
80. St. Leo II:
August 17, 682 - July 3, 683 (10 months)
The most important historical aspect of Leo II's reign as pope seem to be his reaffirmation of the condemnation of Pope Honorius I for his position in the Monothelite controversy.
81. St. Benedict II:
June 26, 684 - May 8, 685 (10 months)
Pope Benedict II had to wait an entire year after his actual election before he received official approval from the emperor. Because of this, he was able to get the emperor to agree to allow the imperial exarach in Ravenna to approve of papal consecrations in order to shorten the time involved.
82. John V:
July 23, 685 - August 2, 686 (1 year)
Not much is known about John V and, apparently, one of the reasons is that he really didn't do much while pope due to serious illness at the time. It is known that he represented a predecessor, Pope Agatho, at the Third Council of Constantinople where the Monophysite heresy was declared anathema as a heresy.
83. Conon:
October 26, 686 - September 21, 687 (1 year)
Conon was a very elderly man when elected pope. He seems to have been one of those popes who is chosen as a "compromise" candidate that everyone could agree on because he was too old to do much, effectively given the electors a break before having to make a more substantive and long-term choice.
84. St. Sergius I:
December 15, 687 - September 8, 701 (13 years, 8 months)
Sergius I was ordered by Emperor Justinian to sign the decrees issued by "Trullan Council" of 692. Among these decrees were findings which placed the patriarch of Constantinople on the same level as the pope and decisions which would allow married men to retain their wives after becoming priests.
