Anglo-Catholicism is a movement in the Anglican/Episcopal Church going back to the 19th century Oxford Movement, whose main idea was that Anglicanism was not a Protestant denomination but a branch of the historic Catholic Church, along with the Roman Catholic Church and Eastern Orthodox churches. Anglo-Catholicism emphasizes the sacramental life of the church, especially the central importance of the Holy Eucharist and the Apostolic succession of the episcopate. Anglo-Catholics are concerned with restoring the liturgical and devotional expression of doctrine in the life of the Anglican Church. (Excerpted from https://www.episcopalchurch.org/library/glossary/anglo-catholic-movement-anglo-catholicism)