Old Firm is one of the most hostile and fierce derbies on the planet.
Before Rangers' recent financial downturn, the two sides dominated the Scottish Premiership for decades in a rivalry that's divided Glasgow by neighbourhood and religion.
But both sides recently visited Yorkhill Hospital in order to visit sick children, a fairly normal practice by football clubs, but the images that emerged show a sign of unity of sorts between the clubs.
Rangers players posing with happy Celtic fans and vice versa?
It must be Christmastime, but this was a wonderful display nonetheless.
[Twitter, h/t Project Babb]