Celtic and Euro nights under the Parkhead lights have been something supporters have cherished over the past 20 years.
After a decade to forget in the 90s, Martin O'Neill's magic touch changed everything as he rediscovered the club's continental love affair.
Celtic enjoyed an incredible run to the UEFA Cup Final in 2003 but supporters in Glasgow's east end are even more raucous when that famous Champions League anthem starts before kick-off.
BT Sport are giving viewers the chance to relive four of the Hoops' finest ever victories in Europe's premier club competition on Sunday evening.
From Henrik Larsson to Moussa Dembele - Celtic have been blessed with players who have specialised in rising to the challenge.
And we thought we'd test your knowledge with 20 questions remembering those thrilling nights on home turf against the likes of Manchester United, Barcelona and the cream of Europe.
So here's your chance to take a trip down memory lane and relive some of the Hoops' biggest matches in the tournament.
