— FC Barcelona (@FCBarcelona) August 9, 2014
The 28-year-old defender, who has already passed a medical – penned a five year contract with the Catalans, believed to be in the region of £15m.
The Belgian international joined the Gunners from Ajax in 2009 and has made 150 appearances for the North London club in all competitions, scoring 15 goals over a five-year spell.
Vermaelen becomes the Blaugrana’s second centre-back signing this summer following the arrival of Valencia’s Jeremy Mathieu.
Is Vermaelen a good signing for Barcelona?