The construction of the Castle of Niella Tanaro probably took place between 1125 and 1160. In this period Castrum Nigella was included in the marquisate of Ceva with the act of division of the lands of the Marquis Bonifacio in 1142. In the following years half of the marquisate was given to Asti (1295) by Giorgio the Second, known as the Dwarf, and in 1299 it was assigned to the sons of Guglielmo the Third of Ceva.