He wants some oil from the lamp of Jerusalem. I don't know, that's what he wanted. He wants 100 Christians that are skilled in the seven arts to come back to teach them about Western society. The seven arts, arithmetic and rhetoric and logic, mathematics and music, and I'm forgetting one. Leave it in the comments below. So, they go back and they end up coming back around 1269. Marco Polo is 15, 16 years old and the Pope answers the question, sends them back to meet with Kubla Khan and they take little Marco Polo with them.