San Flaviano is a Romanesque style, Roman Catholic church in Montefiascone, in the province of Viterbo, Lazio, Italy.
The lower church has columns with capitals carved with animal and vegetable motifs.
A twelfth century fresco of Christ Pantocrator is found on the lower apse, above a depiction of Saint Flaviano martyr on horseback.
[2] The upper church interiors was partially refurbished in the 18th century under the patronage of Cardinal Pompeo Aldovrandi.
He commissioned a canvas by Giuseppe Antonio Ghedini, depicting the Martyrdom of St Flaviano (1740) for one of the chapels.