On Tuesday of the week, Jesus was relaxing up on the Mount of Olives with a few of His disciples ( Peter, James, John, and Andrew) and the four of them asked him about the end of the temple. Jesus had made it clear earlier that it would be destroyed. Naturally that was a big claim, so any young jew would be curious for some clarification.
Why don't you read Mark 13:1-37.
Then when you're finished, listen to this.