535 – John II [Mercurius], Roman Catholic Pope (533-35), dies at about 60 [birth date uncertain]
1079 – Stanislaus, Polish clergyman (Bishop of Kraków, 1072-79), martyr, and Catholic saint, murdered by of King Bolesław II the Bold, at 48 [date observed in Poland, exact date disputed, some sources say April, some May 7]
1278 – Emperor Duanzong of China (b. 1268)
1945 – Bernhard Rust, German Nazi politician and Minister of Science, Education and National Culture (1934-45), reportedly commits suicide at 61
1985 – Karl Marx, German composer and conductor, dies at 87
1985 – Adolphus “Dolph” Sweet, American actor (Gimme a Break, Which Way is Up), dies of cancer at 64
1991 – Jean Langlais, French organist, and composer (Missa Salve Regina), dies at 84
1996 – Garth Williams, American illustrator (Charlotte’s Web), dies at 84
1998 – Jack Heslop-Harrison, English botanist, Director of Kew Gardens (1970-76), dies at 78
2006 – Viola Mae Wilkerson, American pop singer (“Gonna Get Along Without Ya Now”), dies of cancer at 69