Complex sentence: The hôtel d'Alluye was classified as a monument historique on 6 November 1929, and the courtyard has been open to the public on European Heritage Days since 2011.
Split into simpler sentences: The Hôtel d'Alluye was classified as a monument historique on 6 November 1929. The courtyard has been open to the public on European Heritage Days since 2011.