A long-lost family album dating back to the 19th century provided the blueprint for the €3m restoration of Kylemore Abbey, in Connemara.
A new RTÉ series, 'Great Irish Interiors', catalogues the painstaking restoration of the castle in Kylemore back to the full glory of its heyday in the late 1800s.
Kylemore has been home to an aristocratic family, a duke and duchess, an order of Benedictine nuns and its last role as a famous boarding school for girls.
The documentary follows the painstaking restoration of previously unseen rooms at the estate, which had been an international girls' boarding school until a decade ago.
'Great Irish Interiors - Kylemore Abbey' will be shown at 8.30pm on RTÉ One tonight