Boxing legend and philanthropist Muhammad Ali was remembered on his Third death anniversary on Monday.

 At 18, he won a gold medal in the light heavyweight division at the 1960 Summer Olympics, and turned professional later that year. He converted to Islam and became a Muslim after 1961, and eventually took the name Muhammad Ali. He won the world heavyweight championship from Sonny Liston in a major upset at age 22 in 1964.

Ali widely known as “the Greatest” was born Cassius Marcellus Clay Jr. on Jan. 17, 1942, in Louisville, Kentucky.

Ali was a leading heavyweight boxer of the 20th century, and he remains the only three-time lineal champion of that division. His joint records of beating 21 boxers for the world heavyweight title and winning 14 unified title bouts stood for 35 years.

He was involved in several historic boxing matches and feuds, most notably his fights with Joe Frazier, such as the Thrilla in Manila and his fight with George Foreman known as the Rumble in the Jungle which has been called "arguably the greatest sporting event of the 20th century" and was watched by a record estimated television audience of 1 billion viewers worldwide, becoming the world's most-watched live television broadcast at the time.

He remained an active public figure globally, but in his latter years made increasingly limited public appearances as his condition worsened, and he was cared for by his family until his death on June 3, 2016.