Autocephaly recognized by some autocephalous Churches de jure: Autocephaly and canonicity recognized by Constantinople and 3 other autocephalous Churches: Spiritual independence recognized by Georgian Orthodox Church:
It was addressed to all Eastern Orthodox Christians, as a response against Pope Pius IX's Epistle to the Easterners which had been issued in January (1848).
[1] The encyclical was solemnly addressed to "All the Bishops Everywhere, Beloved in the Holy Ghost, Our Venerable, Most Dear Brethren; and to their Most Pious Clergy; and to All the Genuine Orthodox Sons of the One, Holy, Catholic, and Apostolic Church".
The encyclical explicitly denounces the Filioque clause added by Rome to the Nicene Creed as a heresy, censures the papacy for missionizing among Eastern Orthodox Christians, and repudiates Ultramontanism (papal supremacy).
It also describes the Roman Catholic Church as being in apostasy, heresy, and schism.