It is especially an ancient agricoltural village, it has been
built during the Gallo-Roman Age. You can see that
seeing lots of the graves of that period, found at the
beginning of the 1900s, of the left side of the Agogna
river, in the place called Mortizza.
The first documentation is about on July 1164, and belongs
to Conti Palatini of Lomello, member of Olevano that lived
in the castle built under their will and destroyed by
Barbarossa. It has been rebuilt  and catch by Facino Cane
in the  1404.
In the 1469 under the will of Federico III° it has been linked 
to Attendolo - Bolognini.
Since 1551 to 1557 it belonged to Beccaria. In that period
the french army destroyed it; so it has been rebuilt for the 
second time, but in the 1745,it was destroyed by the 
Austrian army again.
Today we can see really little of that castle, even after
the rebuilding in the 1758, under the control of the 
architect  Lorenzo Cassani the main esponent  of the 
Barock in Pavia. S. Salvatore church and San Michele
are remembered since the 1259 and they have been 
built by Olevano who together with their descendents, 
Sir. Marchese  Baldassarre from Olevano in 1753 built
a new parish church in renaissence style completed
with the old bell tower in the  1749.
In Olevano in the 1994 has been inaugurated the 
museum of village art and traditions in order to let the
people know the ancient Lomellina's culture.
On the 15 August (ferragosto) together with the fest of
San Rocco there is " La sagra del Salam dla duia "
tipical pork salami conserved  in fat, in a special 
big  earthenware box called "le olle".
San Michele coulselin festival, the fourth Sunday of
October with folkloristic and cultural venets linked to the 
descovering of the country traditions importance.

The Castle

Parish Church