Turkey international defender Serdar Aziz has joined Galatasaray from fellow Turkish club Bursaspor.
The 25-year-old, who has represented his country nine times, has signed a four-year deal with Jan Olde Riekerink's side.
Centre-back Aziz told his new club's website: "It is a great day for me, I'm very happy.
"I'm lucky to be at a club world giant. My responsibility will be great. I am a person with goals and I will fight to give Galatasaray my best."
Aziz, who missed out on Turkey's Euro 2016 squad, won the Turkish Super Lig title with Bursaspor in 2010.
- Galatasaray EN (@Galatasaray) June 22, 2016
He arrives at the Turk Telekom Arena following a disappointing season for Galatasaray which saw them finish sixth, 28 points behind champions Besiktas.
Welcoming Aziz to Istanbul, Galatasaray president Dursun Ozbek told the club website: "We are preparing for the new season. He is a person I have personally followed for a long time.
"I think Galatasaray will find this transfer very useful. And to his family I say 'welcome.'"