The Church of San Francesco in Mazara del Vallo was built on top of a pre-existing church dedicated to San Biagio, commissioned by the great count Ruggero I d'Altavilla in the second half of the 11th century. (Entry from the Italian Wikipedia page, CC BY-SA. Location marked by the OpenStreetMap community.)
In the app, check in on site: you earn a point and the AI guide tells you about the place in your language.
