William III, a scion of the Hauteville dynasty, was the last Norman king of Sicily, who reigned briefly for ten months in 1194. He was overthrown by his great-aunt Constance I and her husband, Emperor
A near-contemporary depiction of William (far left) with his father Tancred (far right) and brother Roger (middle).
The torture of William III of Sicily, Giovanni Boccaccio: De Casibus Virorum Illustrium, 15th century ed. Note that William III was no older than seven years of age when this supposedly happened.
Constance I was the queen of Sicily from 1194 until her death and Holy Roman Empress from 1191 to 1197 as the wife of Emperor Henry VI.
William III of Sicily
…a scion of the Hauteville dynasty, was the last Norman king of Sicily, who reigned briefly for ten months in 1194. He was overthrown by his great-aunt Constance I and her husband, Emperor Henry VI. William was the second son of Count Tancred of Lecce and Sibylla of Acerra. When in 1189 King William II of Sicily…
Constance imprisoned, from Liber ad honorem Augusti.
Constance and Henry, from the Liber ad honorem Augusti of Petrus of Ebulo, 1196
Constance's tomb, in the Cathedral of Palermo.