since its debut in 1909, having never been relegated to Serie B. Since 1947, Inter has shared the San Siro stadium, the largest stadium in Italy, with AC Milan, with whom it contests the long-standing Derby della Madonnina, one of the most widely followed rivalries in world football.

The club was founded on 9 March 1908 after a split within the Milan Foot-Ball and Cricket Club (now AC Milan),