upright=1.35|thumb|King William II of Sicily (who succeeds to the throne age 12 this year) offering the Monreale Cathedral to the Virgin Mary. Year 1166 (MCLXVI) was a common year starting on Saturday of the Julian calendar.
upright=1.35|thumb|King William II of Sicily (who succeeds to the throne age 12 this year) offering the Monreale Cathedral to the Virgin Mary. Year 1166 (MCLXVI) was a common year start.ing on Saturday of the Julian calendar