It is a great year for them, winning the Copa has its merits, La Liga a bit more, and winning the Champions League could be the same as both, and maybe a little more, depending on for who.
A 4-2 win over Deportivo La Coruna sealed the deal for Ernesto Valverde's side, with a goal from Philippe Coutinho and a hat trick from Lionel Messi getting the business done. "We know how hard it is to win the league".
"It's a shame for us and the club, but he deserved to go like that", said Messi.
Barca finally saw off their stubborn hosts, though, as Messi pounced after a brilliant one-two with Luis Suarez before slotting in to complete his 30th La Liga treble.
The two-hour-long parade also served as a farewell for veteran playmaker Andres Iniesta, who last week announced he will not return for a 17th season with the club. "We have been far superior to our rivals, we haven't lost a match during the whole season", Messi said.
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Barcelona remains unbeaten after 34 matches and will try to become the first team to go the entire season without a loss in the competition's current format. "We've had some tough times and we've overcome everything without losing, which is unbelievable".
As arch-rivals Real Madrid continue their bid for a record-extending 13th Champions League title, Barca fans are left pondering what might have been had their turbulent season gone differently.
The three goals on Sunday allowed Messi to take the lead in the Golden Boot race, surpassing the 31 goals scored by Liverpool forward Mohamed Salah in the Premier League.
Earlier on Sunday, Kevin Gameiro scored a second-half penalty just seven minutes after Fernando Torres had missed a spot-kick as Atletico Madrid claimed a 1-0 win at Alaves.