Ali Sami Yen was a prominent Turkish football player and sports administrator, born on May 20, 1886, in Istanbul, Turkey. He is best known as the founder of Galatasaray Sports Club, one of Turkey's most successful and popular football clubs, established in 1905. His vision was to promote sports and physical education among Turkish youth. Yen played as a forward and was known for his leadership on and off the field. He served as the club's first president and played a crucial role in developing Turkish football. His contributions have left a lasting legacy in Turkish sports history.