Muhammad Ali is widely considered “The Greatest” in boxing and won multiple heavyweight championships. See photos from some of his most memorable fights.

The sale will feature items from across Ali's career, from training bags he used as a teenager in the 1950s (valued at more than $10,000) to gloves from his big ticket fights.

* Feb. 15, 1978 - Ali, now 36, loses his titles by split decision to Leon Spinks, 25, who had only seven professional fights after winning a gold medal in the 1976 Olympics.