What is associated with: at his death in 1941 this pianist was president of polands exiled government?

What is associated with: at his death in 1865 this assassin was supposedly engaged to lucy hale daughter of an ex senat… What is associated with: at his death in 1902 he left most of his fortune to establish a scholarship program to study a… What is associated with: at his death in 1915 this educator was buried on the campus of his tuskegee institute? What is associated with: at his death in 1931 this jersey boy had more than a thousand patents to his name? What is associated with: at his death in 1971 there were more than 1600 department stores bearing his name? What is associated with: at his death in 1995 this polio vaccine developer was working on another vaccine to prevent fu… Based on the clue 'at his death in 323 bc alexander the greats empire...', what is the answer? What is associated with: at his death in april 1955 his brain was preserved his ashes scattered in the delaware river?