May 17 On this day in history guido van Arezzo, Italian music theorist, dies
Nov 01 Henry IV, German emperor (1056/84-1105) [or Nov 11] on this day in history.
Nov 01 Henry IV, German emperor (1056/84-1105) [or Nov 11] was born on this day in history.
Nov 11 Henry IV, Holy Roman Emperor (d. 1106) was born on this day in history.
Read More »
Important Dates And Events In History - Hisdates.Com