John Henry, Elector of Mainz

John Henry (Johann Heinrich; 9 May 1241 – 1 January 1312) was Elector of Mainz from 5 June 1260 to his death.

Early life
John Henry was born on 9 May 1241 to Emperor Charles IV and Bartilmebis of Arce. He is the fourth oldest son and third in line to the throne when his stillborn brother, Henry Otto died less than one year old. John Henry was enjoying his childhood outside of the royal palace of Nuremberg Castle which Charles IV and his family was staying.