A frontal of one of the altars in St. Nicholas church.

St. John Of Nepomuk was drowned in the Vltava river in Prague, at the order of King Wenceslaus, King of the Romans and King of Bohemia.
Later accounts state that he was the confessor of the queen of Bohemia and refused to divulge the secrets of the confessional.
On the basis of this account, John of Nepomuk is considered the first martyr of the Seal of the Confessional, a patron against calumnies and, because of the manner of his death, a protector from floods.