The Castello di Racconigi has two spectacular façades (the one facing the town and the other facing the park) are the regal ones typically associated with a royal castle. The characteristics of the original fortified structure have been lost almost entirely and what little remains can only be seen in parts of the foundation. Nevertheless, a medieval castle once stood on this same site. It had been built to defend the populated area that had developed in the vast, fertile plain to the right of the Màira stream. This was probably not long after the territorial division of the government in 1091, when the area of Racconigi (then belonging to the Marquise Adelaide) was passed on to Bonifacio del Vasto. For a long time Racconigi remained part of marquisate of Saluzzo. The history of the House of Savoy records that it was passed on to the Savoia-Acaja princes at the beginning of the thirteenth century. They held it until 1418, when, upon the death of Giacomo d’Acaja (the last leading member of the lineage) the feud was handed down to his natural son Ludovico d'Acaja, Count of Racconigi. When Bernardino II, the last of his descendants, died in 1605 (causing the extinction of the Savoia-Racconigi line) Duke Carlo Emanuele I assigned the Castle and land to his younger son Tommaso (1620), along with the title of Prince of Savoia-Carignano, thus giving rise to the Savoy cadet line that with Carlo Alberto would ascend to the throne in 1831.