Answer
In the 2014-2015 season, under coach Luis Enrique, Barcelona clinched the treble, winning the La Liga, Copa del Rey, and UEFA Champions League. They secured the league title with a 1–0 victory against Atlético Madrid. The Copa del Rey triumph came after defeating Athletic Bilbao 3–1 in the final. The crowning moment was conquering Europe with a dominant 3–1 win over Juventus in the Champions League final.