Basilica of San Simplicio, Olbia

The Basilica of San Simplicio is a Basilica in Olbia, northern Sardinia, Italy.

It was built in the late 11th century on a small hill, once located outside the city walls, used since the Carthaginian times as a cemetery area. In the area already existed a Palaeo-Christian church, built most likely between 594 and 611, which in turn was located near a Roman temple. The apse, the walls and most of the internal columns were finished in the 11th century; the barrel vault of the aisles and the upper parts of the side walls were built in the early 12th century, while the façade was completed in the middle of that century.