A phrase commonly used to refer to the participation, matches, or historic achievements of FC Barcelona, the renowned Spanish football club, in the UEFA Champions League, Europe's premier club soccer competition, where they have secured five titles (1992, 2006, 2009, 2011, 2015).

Informally evokes nostalgia for Lionel Messi's era of dominance or sparks debates on the club's modern-day European campaigns.