[1] In the 16th century, the fortress still retained a medieval appearance, featuring a central keep, a courtyard surrounded by rural buildings and a garden, all enclosed by a sturdy defensive wall and a moat.

Upon his death, the project was interrupted, but the castle already had two courtyards (one internal and one facing the village of Agliè) and an eastern façade with the two towers transformed into small pavilions.

The architect Ignazio Renato Birago di Borgaro was entrusted with its renovation, which included the creation of spacious apartments inside and the construction of a parish church to be connected to the castle by a two-story gallery.

[2] In the early 19th century, during Napoleon's occupation, the castle of Agliè was turned into a refuge for the poor, and the surrounding park was sold to private owners and repurposed for agriculture.

During the 1830s and 1840s, further works were executed, including the creation of a large lake and a smaller pond which dramatically transformed the Italian-style garden into a romantic landscape under the direction of German architect Xavier Kurten.