Castle of Aguiló Monument · Santa Maria d'Oló, Moianès, Barcelona Remains of the medieval castle of Aguiló, in the municipal territory of Santa Maria d'Oló (Moianès). It was a subsidiary castle of the nearby Castell d'Oló, under the lordship of the Count of Barcelona, acting as its forward guard. It was the centre of the old veïnat de la Frau, one of the municipality's scattered population settlements. Photo: Antoni Grifol (CC BY-SA 3.0) What to see and do in Santa Maria d'Oló