ɪn ɑːktˈoʊbɚ ɔːɹ noʊvˈɛmbɚ wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd sˈɪksti sˈɪks, stˈiːvən dˈuː pɚtʃˈɛ wʌz ɐpˈɔɪntᵻd tʃˈænsɛlɚ ænd ˌɑːɹtʃbˈɪʃəp ʌv pˈælɚmˌoʊ, bᵻkˈʌmɪŋ ðə hˈɛd ʌv ɡˈʌvɚnmənt.
In October or November 1166, Stephen du Perche was appointed chancellor and Archbishop of Palermo, becoming the head of government.