Charles-Marie Widor - Symphony for organ No. 5 in F minor
Widor (1844-1937) was the most important of a group of French composers whose works were mainly for the organ. His ten symphonies for organ solo are inspired, even though only the exuberant toccata final movement of the fifth (from 1880) has gained wide-spread recognition. For me, the complete organ symphony should be played to put the toccata into perspective. Relevant links below.