Name the Artist: Too Late To Say Goodbye?

Questions

Which nurse organized a hospital for British troops during the Crimean War?

Which empire did Cortes destroy in 1521?

Which Persian astronomer is best known for his poems or 'Rubaiyat'?

Which Native American princess saved the life of settler John Smith in 1606?

Which Irishman set up shelters for over 50,000 homeless children?