"For the Moravian Church, see Unitas Fratrum.The Unity of the Brethren (Czech: Jednota bratrsk\u00E1; Latin: Unitas Fratrum), also known as Czech or Bohemian Brethren, is a Christian denomination whose roots are in the pre-Reformation work of priest and philosopher Jan Hus, who was martyred in 1415."@en . . .