The Moravian Brethren, also known as the Unitas Fratrum, is a Protestant denomination that originated in the early 15th century in what is now the Czech Republic. They emerged from the teachings of John Huss, a reformer who advocated for church reform and the use of the Bible in the vernacular. The Moravians emphasize community, mission work, and a personal relationship with God. In the 18th century, the Moravian Brethren gained prominence under the leadership of Count Nikolaus von Zinzendorf. They established missions in various parts of the world, including the Americas and the Caribbean, focusing on education and social welfare. Today, the Moravian Church continues to promote ecumenism and social justice.