From Westport News:
A tale, part fable, part history, of a Sicilian queen in medieval times will be unfolded by composer John Marino at the Temenos Institute on Nov. 5, as he conducts a lecture on the story of "Costanza," the basis of an opera he created the music for.
The story is about Costanza, the heiress of the Norman kings of Sicily. Her father was Roger II who reigned over what is considered the "Golden Age" of Sicily. Palermo was considered the "jewel" of the Mediterranean.