The altar at the front of St Martin in the Wall in Prague. The church gets its name from the time when it formed part of the wall between the Old Town and New Town. Originally a Romanesque church it was reconstructed twice in the Gothic style. It was here that Jan of Hradec gave the chalice to parishioners, in direct contravention of Catholic practice where only bread was handed out to the congregation. The chalice, above the altar soon became a powerful symbol of Hus' followers, the Hussites.
Jan Hus (or John Huss, 1369 - 1415) was a Czech priest, philosopher and one of the first church reformers. Hus attacked moral failings among the clergy and promoted some of the teachings of John Wycliffe (1331 - 1384), an English reformere who had been burned at the stake in 1384. Hus was excommunicated for his views in 1410 and burned at the stake as a heretic in Konstanz on 6 July 1415.