His paternal cousins included Louis XV of France, the future Ferdinand VI of Spain and the Prince of Carignan.

His uncle Francis I, Holy Roman Emperor[a] proposed his daughter Archduchess Maria Christina of Austria as a prospective wife but the marriage between the two never materialised.

It was under Savoy that the building would be embellished under the direction of Benedetto Alfieri, a popular Savoyard architect of the era.

Noted as a good soldier[5] Chablais was given control of the Army of Italy which contained French troops and intended on restoring the monarchy in France after the execution of Louis XVI in 1793.

He died in Rome aged 66 and was buried at the church of San Nicolo dei Cesarini then later moved to the Royal Basilica of Superga, Turin.