The Archbishop of York has begun a week-long fast and vigil for world peace.
Dr John Sentamu will pray on the hour every hour, from 06:00 to 18:00 BST, until next Sunday.
Dr Sentamu said the vigil, taking place in St John's Chapel at York Minster, would show "solidarity with the suffering people of our world, particularly in the Middle East".
He camped in the Minster in 2006 for a similar peace vigil.
'Solidarity with homeless'
Speaking about the Middle East conflict, the archbishop said: "Please stop all this butchering, it's just gone on too long, longer than I have been on this Earth.
"I hope there'll be peace. I hope they will stop thinking that by violence they will win the war.
"When you respond to violence with violence, you increase greater darkness on a night already devoid of stars."
Dr Sentamu will sleep at York Minster during the vigil, but said he would not take a tent this year "to show solidarity with the homeless".