Oliva has been known since 972, when it was donated by Emperor Otto I to his daughter in law Theophano, who then in turn donated it (along with other properties in the nearby villages of Montalto and Mairano near Casteggio) to the monastery of Santa Maria delle Cacce in Pavia. Passed under the dominion of Pavia (1164), it was included in the podesteria (jurisdiction) of Montalto Pavese enfeoffed to the family Belcredi.
Oliva has been known since 972, when it was given by Emperor Otto I to his daughter-in-law Theophano, who then in turn gave it (along with other properties in the nearby villages of Montalto and Mairano near Casteggio) to the monastery of Santa Maria delle Cacce in Pavia. Passed under the dominion of Pavia (1164), it was included in the podesteria (jurisdiction) of Montalto Pavese enfeoffed to the family Belcredi.