Arsenal have completed the signing of Greek international Sokratis Papastathopoulos from Borussia Dortmund.
The Gunners have announced that the experienced defender has signed a "long-term contract" after joining for "an undisclosed fee".
The 30-year-old, who won two league titles and one German cup with Dortmund, will wear the number five shirt for Arsenal.
Sokratis's previous clubs include Werder Bremen, AC Milan, Genoa and AEK Athens, and he also has 79 caps from the Greek national team.
New Arsenal boss Unai Emery previously already added experience to his backline with the signing of Swiss veteran Stephan Lichtsteiner from Italian giants Juventus.
