County of Sicily was created by Robert Guiscard in 1071 for his younger brother Roger Bosso. Guiscard himself had received the title Duke of Sicily ("dux Siciliae") in 1059 from Pope Nicholas II as encouragement to conquer it from the Muslims. In 1061 the first permanent Norman conquest (Messina) was made and in 1071, after the fall of Palermo, the capital of the emirate and future capital of the county, Guiscard invested Roger with the title of count and gave him full jurisdiction in the island save for half the city of Palermo, Messina, and the Val Demone, which he retained for himself.
Nicasius of Sicily priest Vincent Venuti in his "Discorso storico-critico" (1762) writes: ...now because of the dominions that the Burgio family had near Caccamo. Or because of devotion, which the Cabrera family exercised toward St. Nicasius, or because of both reasons, I figure that, little by little, some what of a cult toward our St Nicasius of Jerusalem, went in Caccamo… His feast day is July 1. Nicasius of Sicily Nicasius (Nicasio, Nicaise) of Sicily (also known as "Nicasio Burgio, Nicasius de Burgo, Nicasio Camuto de Burgio, Nicasius Martyr, Nicasius of Jerusalem") ( 1135 – 1187) is venerated as a martyr in the