Perhaps the greatest team of all time...
Pep Guardiola's debut season in 2008 actually got off to the worst possible start when he lost on the opening day of the season, but it turned out to be nothing more than a blip as Barcelona went on to dominate.
The Spanish giants played some absolutely scintillating stuff under the now-Manchester City boss that season. Notable results included a 6-2 demolition of fiercest rivals Real Madrid, and a 4-1 victory over Atletico Madrid to claim the Copa del Rey.
Not content with the double, Barca then outplayed Manchester United in Cardiff's Champions League final, and had people purring that they were watching the most aesthetically-pleasing team ever to play the game.
Barcelona made history at the end of the 2014/2015 season by becoming the first European club to claim a second treble in their history.
It was an incredible season that saw the attacking trio of Lionel Messi, Luis Suarez and Neymar plunder 122 goals between them in all competitions.
Barca claimed the league title by beating Atletico Madrid 1-0, their seventh in ten years, and beat Athletic Bilbao in the Copa del Rey final 3-1.
That was before they toppled Juventus in the Champions League final to stop them from winning a treble of their own. They are also the latest club to have enjoyed a treble winning season, including a trophy for Europe's most prestigious club competition.