The move follows Arthur’s transfer from Barca to Juventus earlier in the day, rounding off this swap deal.
Pjanic, 30, has signed a four-year deal and has a release clause of €400m.
— FC Barcelona (@FCBarcelona) June 29, 2020
Like Arthur, he will remain at his current club until the end of the season.
Pjanic leaves Serie A after nine seasons in Italy playing for Roma and Juventus.
During his spell in Turin, the Bosnian international has won three Serie A titles – more than likely soon to be with Juve four points clear at the top.