The Moravian Church, (Latin: Unitas Fratrum, meaning Unity of the Brethren), is a Protestant denomination. Its religious heritage began in 1457 in Kunvald, Bohemia, Czech Crown lands. It places a high premium on Christian unity, personal piety, missions, and music.

The church's emblem is the Lamb of God (right) with the flag of victory, surrounded by the Latin inscription: Vicit agnus noster, eum sequamur, or in English: "Our Lamb has conquered, let us follow Him".

The movement that was to become the Moravian Church was started by Jan Hus (English: John Huss) in the late 14th century. Hus objected to some of the practices of the Roman Catholic Church and wanted to return the church in Bohemia and Moravia to what were the practices in these territories when it had been Eastern Orthodox: liturgy in the language of the people (i.e. Czech), having lay people receive communion in both kinds (bread and wine), married priests, and eliminating indulgences and the idea of Purgatory. Evidence of their roots in Eastern Orthodoxy can be seen today in their form of the Nicene Creed, which like Orthodox Churches, does not include the filioque clause. In rejecting indulgences, Jan Hus can be said to have adopted a doctrine of justification by grace through faith alone; in doing so, the Moravians arguably became the first Protestant church.