The club claim to be a continuation of the original amateur Crystal Palace football club first established in 1861, which would make them the oldest professional football club in the world, after historians discovered a direct lineage through their ownership under the same Crystal Palace Company. Although Crystal Palace's official founded date is 1905, both the amateur and professional clubs played inside the grounds of the Crystal Palace Exhibition building, with the professional club using the FA Cup Final stadium for its home games until 1915, when they were forced to leave due to the outbreak of the First World War. In 1924, they moved to their current home at Selhurst Park.