Ajax was officially founded on March 18, 1900, in Amsterdam, by a group of friends led by Floris Stempel, who became the club's first president. The club was named after the Greek hero Ajax, a character from Homer's Iliad known for his strength and courage—qualities the founders hoped would define their new football team.
The early decades were marked by steady growth as the club established itself in Dutch football. Ajax won its first national championship in 1918, marking the beginning of what would become a storied tradition of success. Throughout the 1920s and 1930s, Ajax continued to build its reputation, capturing several more league titles and establishing itself as one of the Netherlands' premier football clubs.
A significant turning point came in 1928 with the construction of De Meer Stadion, which would serve as Ajax's home ground for nearly 70 years. This period also saw the emergence of early club legends like Piet van Reenen, whose goal-scoring prowess helped cement Ajax's reputation for attacking football.
The club's progress was temporarily halted during World War II when the Netherlands fell under Nazi occupation. Football continued in a limited capacity, but the war years represented a challenging chapter in the club's history. Following the liberation, Ajax resumed its ascent in Dutch football, setting the stage for even greater achievements to come.

Ajax team photo from the 1920s after winning one of their early national championships.