Pope Francis is calling all to join him in prayer on Tuesday 20 September as he visits Assisi, Italy.
During his visit there will be an ecumenical service with representatives from other religions and a time of silence to remember all victims of war.
Candles will also be lit and a sign of peace shared.
Watch young people singing the song that moved the Pope during the interreligious gathering at the Ground Zero memorial in New York in 2015.
Let us, alone and with others, continue to pray and work for peace.