History of Galatasaray S.K. call their club "Galata Sarayı". In 1905, during the era of the Ottoman Empire, there were no laws for associations so the club could not be registered officially, but, after the 1912 Law of Association, the club registered legally. This was how the first Turkish football club was founded. Among with the founder Ali Sami Yen, the co-founders were the ones who were keen to do this sport, such as Asim Tevfik Sonumut, Reşat Şirvani, Cevdet Kalpakçıoğlu, Abidin Daver and Kamil. At first, the colours of Galatasaray were red and white. These are the colours in the modern Turkish flag.
Beşiktaş–Galatasaray rivalry (basketball) teacher laid the foundations of this sport in Turkey. 7 years later, Ahmet Robenson, a physical education teacher in Galatasaray High School decided to introduce a new game to students in 1911. Robenson, who also became a Galatasaray S.K. president later, popularized this sport in Turkey. Galatasaray SK is the pioneer in Turkish basketball history, and basketball had always been very important for the club. The team has won 4 national championship titles and 16 İstanbul League title. Former president of the club, Özhan Canaydın was a former player of basketball team. "As of 16 December 2017" Beşiktaş–Galatasaray rivalry (basketball)