Pope John X
Marozia became the concubine of 45-year old Pope Sergius III when she was 15 and later took other lovers and husbands. She ensured that her son John (who was rumoured to have been fathered by Sergius III) was seated as Pope John XI according to "Antapodosis sive Res per Europam gestae" (958–962), by Liutprand of Cremona (c. 920–972). Liutprand affirms that Marozia arranged the murder of her former lover Pope John X (who had originally been nominated for office by Theodora) through her then husband Guy of Tuscany possibly to secure the elevation of her current favourite as Pope Leo VI. There is no record substantiating that Pope John X had definitely died before Leo VI was elected since John X was already imprisoned by Marozia and was out of public view.