Bonjour Roselyne,
It's great that you are planning a visit to Dublin next year!
Doheny House isn't listed on our website, so we unfortunately don't know whether it's open for business or not. Although, it seems like there's an issue with their online booking system. Please feel free to reach out to them directly for more information.
What would you like to see and do during your time in Dublin?
A bientôt,
Antoine