Kipchak Mongols besieging a Genoese trading centre on the Crimean coast catapulted their own dead into the city. The cause of death was a mysterious disease. The Genoese escaped by sea taking the 'Black Death' with them. They landed at Messina in Sicily. Black Death or Bubonic plague was spread by the rat flea. The name Black Death came from the colour of the swelling in the groin, armpit or neck. The person suffering went into a coma and dies soon after. In Europe an estimated 25 million people died. The plague reached Britain in 1348 and again in 1360 and the population may have been reduced by a half. ^[1]

After an initial selection that seemed favourable was quashed by one of the Cardinals, Stephen Aubert, the Bishop of Ostia was chosen and crowned on the 30th of December taking the name Innocent.