The traces of mankind go way back when in the Maremma: there are Protovillanovian traces near Canino and Blera, Etruscan settlements in Barbarano Romano, Castel d'Asso, Norchia, Tuscania, Tarquinia, Vulci and many other minor towns in the area.
After the Romans, the majority of the towns fell under the domain of the Barbarians and Longobards, re-emerging as the Mediaeval towns we can still see today. The Churches of San Pietro and Santa Maria Maggiore (11th Century) in Tuscania and Santa Maria in Castello (1121) in Tarquinia are good examples.

During the Renaissance the towns of Tarquinia and Tuscania benefitted the most, as testified by the Palazzo Vitelleschi, now home of the National Etruscan Museum in Tarquinia, the Cathedral of San Giacomo in Tuscania and the church of Sant'Egidio in Cellere.
Good examples of the Baroque style can be seen in the aristocratic residence of Rocca Respampani (1600) near Monte Romano and the Chiesa Collegiata in Canino.