A handsome neo-Renaissance palace at the south-western edge of the centre, built in 1916 for the industrialist Augustin Zulueta and donated to the province in 1942. The building now houses the Museum of Fine Arts of Álava.
The garden facade, with its pillared loggia overlooking the park, is the most photographable corner. The interior staircase and main reception rooms are preserved as part of the museum tour.