Viterbo - San Silvestro

The church dedicated to San Silvestro (aka "Chiesa del Gesù") church may have been erected around 1000.

On 13 March 1271 Henry of Almain, son of Richard, Earl of Cornwall and Count of Anjou, grandson of John, King of England (aka "John Lackland"), attended a mass here together with King Philip III of France (aka "Philippe le Hardi") and Charles of Sicily (aka "Charles I of Naples"). During the ceremony Henry of Almain was attacked by his cousins Simon and Guy de Montfort. Henry was dragged out and stabbed to death by his cousins right in front of the church. The brothers claimed to have done this in revenge of the death of their father and brother, who had been beheaded during the Battle of Evesham (1265).

For this crime the Montfort brothers were excommunicated, and Dante banished Guy to the river of boiling blood in the seventh circle of his Inferno.