The Second Council of Nicaea was the seventh ecumenical council; it met in Nicaea in 787 AD to restore the honoring of icons or holy images, which had been suppressed by imperial edict inside the Byzantine Empire during the reign of Leo III (717-741). His son Constantine V (741-775) had held a synod to make the suppression official.
Although the veneration of icons had been finally abolished by the energetic measures of Constantine V, whose iconoclastic tendencies were shared by his son, Leo IV, after the latter's early death, his widow Irene, as regent for her son, began its restoration, moved thereto by personal inclination and political considerations.
When in 784 the imperial secretary Tarasius was appointed successor to the patriarch Paul IV, he accepted on condition that the intercommunion with the other churches should be reestablished, that is, that the images should be restored. However, as a council claiming to be ecumenical had abolished the veneration of icons, another ecumenical council was necessary for its restoration. Pope Adrian I was invited to participate and gladly accepted. The invitation intended for the oriental patriarchs could not even be delivered to them. The Roman legates were an archbishop and an abbot, each named Peter.
In 786 the council met in the Church of the Apostles in Constantinople, but soldiers in collusion with the opposition entered the church and broke up the assembly. The government now resorted to a stratagem. Under the pretext of a campaign, the iconoclastic bodyguard was sent away from the capital, disarmed, and disbanded.
The council was again summoned to meet, this time in Nicaea, since Constantinople was still distrusted, assembling Sept. 24, 787. It numbered about 350 members; 308 bishops or their representatives signed. Tarasius presided, and seven sittings were held in Nicaea. Proof of the lawfulness of the veneration of icons was drawn from Ex. xxv.17 sqq.; Num. vii. 89; Heb. ix. 1 sqq.; Ezek. xli., and Gen. xxxi. 34, but especially from a series of passages of the Church Fathers; the authority of the latter was decisive.
It was determined that "As the sacred and life-giving cross is everywhere set up as a symbol, so also should the images of Jesus Christ, the Virgin Mary, the holy angels, as well as those of the saints and other pious and holy men be embodied in the manufacture of sacred vessels, tapestries, vestments, etc., and exhibited on the walls of churches, in the homes, and in all conspicuous places, by the roadside and everywhere," to be revered by all who might see them. For the more they are contemplated, the more they move to fervent memory of their prototypes. Therefore, it is proper to accord to them a fervent and reverent adoration, not, however, the veritable worship which, according to our faith, belongs to the Divine Being alone-- for the honor accorded to the image passes over to its prototype, and whoever adores the image adores in it the reality of what is there represented.
The clear distinction between the adoration offered to God and that accorded to the images may well be looked upon as a result of the iconoclastic reform. The twenty-two canons drawn up in Constantinople also served ecclesiastical reform. Careful maintenance of the ordinances of the earlier councils, knowledge of the Scriptures on the part of the clergy, and care for Christian conduct are required, and the desire for a renewal of ecclesiastical life is awakened.
The papal legates voiced their approval of the restoration of the veneration of icons in no uncertain terms, and the patriarch sent a full account of the proceedings of the council to Hadrian, who caused the same to be translated, which translation Anastasius later replaced with a better one.
This council is celebrated in the Eastern Orthodox Church as "The Sunday of the Triumph of Orthodoxy" each year on the first Sunday of Great Lent, the fast that leads up to Easter.
See also: First Council of Nicaea
Initial text from Schaff-Herzog Encyc of Religion. Please update as needed.