Denbighshire-based Ruthin Castle, which was taken over by its new owners following administration, has 60 bedrooms including its luxurious Prince of Wales suite, featuring lavish antique furniture and an open fireplace.
The hotel also has a renowned restaurant and the Moat Spa on the castle grounds, alongside several spaces for events, with the Grand Salon hosting up to 120 for a reception.
Prima Hotel Group plans to invest further in the property. It currently holds a portfolio of luxury hotels across England and Scotland. Ruthin Castle is the first Welsh property in the Prima group.