Cause of death: heart attack
Manuel de Falla y Matheu (Spanish pronunciation: [maˈnwel de ˈfaʎa], 23 November 1876 – 14 November 1946) was a Spanish composer and pianist. Along with Isaac Albéniz, Francisco Tárrega, and Enrique Granados, he was one of Spain's most important musicians of the first half of the 20th century. He has a claim to being Spain's greatest composer of the 20th century, although the number of pieces he composed was relatively modest.
Source : Wikipedia