First mention of Quintanilla de Onsoña Historical milestone · Quintanilla de Onsoña, Vega-Valdavia, Palencia Image of Quintanilla de Onsoña, not of the place itself. The place is first documented in 1072 and received a charter in 1292; in 1352 it appeared as abbey land and in 1484 it was incorporated into the entailed estate of a Castilian nobleman. 1072 Photo: Lourdesm5 (CC BY-SA 3.0) What to see and do in Quintanilla de Onsoña