Basilica San Simplicio
Olbia's little basilica, a short walk from the main Corso Umberto I, is the city's unmissable sight. The simple granite structure dates from the 11th century, part of the great Pisan church-building program, using pillars and columns recycled from Roman buildings. The basilica has a bare, somewhat somber interior; its three naves are separated by a series of Romanesque arches, and fragments of frescoes are visible behind the altar. Recent renovations of the monument have unearthed the remains of a Greek and Roman necropolis, which is now open to the public (the entrance is in the car park beneath the piazza).
