The Church of Purgatory is one of the many churches in Sciacca, a municipality in the province of Agrigento, located in the historic center of the town, in the ancient district known as Terra Vecchia. (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.