Galatasaray, Beyoğlu Galatasaray, Beyoğlu Galatasaray is a quarter on the European side of Istanbul, the largest city of Turkey, belonging to Beyoğlu district of the province of Istanbul, Galatasaray Square is located at approximately the center of İstiklal Avenue and is home to the oldest secondary school in Turkey: the Galatasaray High School (Galatasaray Lisesi), originally known as the "Galata Sarayı Enderun-u Hümayunu" ("Galata Palace Imperial School"). Galatasaray S.K., one of the most famous football clubs of Turkey, was established in 1905 by the students of this school. The "50th Anniversary of the Republic" (1973) monument at Galatasaray Square was sculpted by
Galatasaray Mobile Galatasaray Mobile Galatasaray Mobile or GS Mobile is a Turkish virtual cellular service provider owned by Galatasaray SK that uses the Avea GSM network for coverage. The company slogan is "one team, one heart, one network". "Avea" is one of three GSM operators in Turkey. It has been founded in 2004 with the merger of the two GSM operators Aycell (Turk Telekom) and Aria (joint venture of Türkiye İş Bankası (51%) and TIM (49%)). TIM and Turk Telekom own 40% stake each and İş Bank Group holds 20%. In September 2006, Telecom Italia announces that, having received authorisation from the