The Ascoli Piceno Baptistery, also known as the baptistery of Saint John, is a religious building found on the eastern end of the piazza Arringo at the center of Ascoli Piceno and sitting next to and just north of the cathedral dedicated to St. Emygdius, the city's patron saint.
The structure, simple and austere in its architectural form, perfectly represents the Romanesque style in Ascoli, and, being ranked among the best examples of Italian works of art, is included in the list of Italian national monuments.
Wikipedia https://en.wikipedia.org/wiki/Ascoli_Piceno_Baptistery
Address 17 Piazza Arringo, Ascoli Piceno 63100, Italy
Coordinates 42°51'13.517" N 13°34'42.488" E