Barcelona sealed their first La Liga title since 2018-19 after a stylish win at the home of city rivals Espanyol - 14 points ahead of second-placed Real Madrid with four games remaining.
2022/2023 La Liga
2-4
Barca were 3-0 up by half-time, Robert Lewandowski scoring his 20th league goal of the season before Alejandro Balde, 19, doubled the lead.
Lewandowski added the third before Jules Kounde's header made it 4-0.
Espanyol did reduce the deficit through Javier Puado and Joselu but remain in trouble near the bottom of the table.
Barcelona have 85 points, 14 more than nearest rivals Real Madrid, with 12 points left to play for.
It is their first La Liga title since club legend Lionel Messi left in August 2021 and first since Xavi was appointed manager in November 2021.
Meanwhile, Espanyol are in danger of a second relegation in four seasons from La Liga after a ninth league defeat in 11 games.
They are four points from safety with four matches left.
Match Events
6' Pedri's shot inches wide
11' GOAL! Espanyol 0-1 Barcelona (Lewandowski)
20' GOAL! Espanyol 0-2 Barcelona (Balde)
24' Lewandowski's shot stopped
40' GOAL! Espanyol 0-3 Barcelona (Lewandowski)
53' GOAL! Espanyol 0-4 Barcelona (Kounde)
70' Ter Stegen makes good save
73' GOAL! Espanyol 1-4 Barcelona (Puado)
90' GOAL! Espanyol 2-4 Barcelona (Joselu)
Line-ups
Espanyol XI: Cabrera, Joselu, Braithwaite, Gomez, Denis Suarez, Pacheco, Darder, Brian Oliván, César Montes, Óscar Gil, Melamed
Subs: Aleix Vidal, K.Bare, José Carlos Lazo, P.Gabriel, Pedrosa, Calero, Puado, Álvaro Fernández, Exposito, Vini Souza, Ángel Fortuño, Luca Koleosho
Barcelona XI: Lewandowski, Busquets, Ter Stegen, Christensen, De Jong, Raphinha, Kounde, Ronald Araújo, Pedri, Álex Baldé, Gavi
Subs: Alba, Roberto, Alonso, Kessie, Dembele, Pena, Ferran Torres, Eric Garcia, Arnau Tenas, Fati, Pablo Torre