Robert Jakoubek
15th-century Protestant doctrine held by the Hussites
Utraquism, also called Calixtinism, was a belief amongst Hussites, a pre-Protestant reformist Christian movement in fifteenth century Bohemia that communion under both kinds should be administered to the laity during the celebration of the Eucharist. Communion in both kinds was a principal dogma of the Hussites and one of the Four Articles of Prague.
via Wikipedia