<Tr> <Td> Unknown </Td> <Td> 15 - 20,000 </Td> <Td> 10,000 </Td> </Tr> <Tr> <Td_colspan="3"> According to Josephus, 1.1 million non-combatants died in Jerusalem, mainly as a result of the violence and famine . Many of the casualties were observant Jews from across the world such as Babylon and Egypt who had travelled to Jerusalem wanting to celebrate the yearly Passover but instead got trapped in the chaotic siege . He also tells us that 97,000 were enslaved . Matthew White, The Great Big Book of Horrible Things (Norton, 2012) p. 52, estimates the combined death toll for the First and Third Roman Jewish Wars as being approximately 350,000 </Td> </Tr> <P> The Siege of Jerusalem in the year 70 was the decisive event of the First Jewish--Roman War . The Roman army, led by the future Emperor Titus, with Tiberius Julius Alexander as his second - in - command, besieged and conquered the city of Jerusalem, which had been controlled by Judean rebel factions since 66 . </P> <P> The siege ended on August 30 with the sacking of the city and the destruction of its Second Temple . The destruction of both the first and second temples is still mourned annually as the Jewish fast Tisha B'Av . The Arch of Titus, celebrating the Roman sack of Jerusalem and the Temple, still stands in Rome . </P>

Who was the roman emperor when jerusalem was destroyed