Chelsea FC

Chelsea are the first club in history to win the European Cup/Champions League, UEFA Cup/Europa League, European Cup Winners Cup, and the UEFA Conference League. Full set.

Chelsea are the first club to win a European final without having a player over the age of 26 in the starting XI.

Was it the European Cup winners Cup or the European Cup where they played in in All white (or all blue) and beat Juventus? (or another Italian team if it wasn't Juventus)

Chelsea's win over Real Betis ended a remarkable winning run for Spanish clubs in European finals. Before the defeat in the Conference League, Spanish sides had won 27 finals in a row.