GENEALOGY OF THE HOUSE OF TANCRED OF HAUTEVILLE. Tancred of Hauteville. | +------------------+---------+-----+--------------+------------+ | | | | | William of the Drogo, Humphrey, Robert ROGER I., Iron Arm, Count of Apulia, Count of Apulia, Guiscard, Count of Lord of Apulia, _d._ 1051. _d._ 1057. Duke of Sicily, _d._ 1046. Apulia, _d._ 1101. _d._ 1085. | | | +----------------------------+ | | | Roger, ROGER II., Duke of Apulia, King of Sicily _d._ 1111. and Duke | of Apulia, William, _d._ 1154. Duke of Apulia, | _d._ 1127. | | +----------------------------+-------------------+----+ | | | Roger, WILLIAM I., Constance, Duke of Apulia. the Bad, _m._ HENRY VI. | _d._ 1166. _d._ 1197. TANCRED of Lecce | | (illegitimate), WILLIAM II., FREDERICK II. _d._ 1194. the Good, _d._ 1250. | _d._ 1189. +----------+---+------------+ _m._ Joanna, | | | daughter of ROGER III., WILLIAM III., Albina, Henry II. _d._ 1194. deposed by _m._ Walter of England. Henry VI. in of 1194. Brienne. CHAPTER VI THE INVESTITURE CONTEST (1056–1125) Minority of Henry IV.—Regency of Agnes—Rivalry of Adalbert and Anno—The Saxon Revolt—Election of Gregory VII.—Beginnings of the Investiture Contest—Canossa and its results—Rudolf of Swabia and Guibert of Ravenna—The Normans and Gregory VII.—Victor III. and Urban II.—Last years of Henry IV.—Henry V. and Pascal II.—Calixtus II. and the Concordat of Worms—Death of Henry V.