The Champions League enters its 25th season this week, and is yet to produce a back-to-back winner.
But if you go back to when the competition was known as the European Cup, repeat champions were not uncommon at all.
In more than 50 years of top-level European football, only 22 teams have lifted the continent's most prestigious club competition.
Can you name all 22? And, more importantly, can you do it inside our four-minute time limit?
The GAA Hour took their show on the road to Castlebar to preview the All-Ireland final with Colm Parkinson, James Horan and some very special guests.
