The Hacienda del Pilar, which owes its name to the Virgin of this dedication placed on its façade, was built from 1904 as a farm and, later, remodeled as a private manor house and for the reception of personalities. Property of the former Minister of Public Instruction, José del Prado y Palacio, Marquis of Rincón de San Ildefonso, Alfonso XIII stayed there on the occasion of his visit to Jaén in 1916. It was accessed through well-kept gardens to the English taste with a monumental fountain in its center and another, in imitation of the Sevillanas, on its side. The façade, with two colonnaded galleries, one of them glazed, had wooden columns and careful grille. All this in a markedly eclectic style.

Inside, the syncretism continued with an element of special interest: a Renaissance courtyard belonging to a palace in Andújar, which was demolished in the second decade of the century and acquired and transferred to El Pilar by its owner. Nine slender columns, eight arches of padded coffered ceilings, spandrels, medallions, shields and noble coats of arms were decontextualized from their original building and moved here along with a large basin fountain, with four shells and two cups, decorated with caryatids. The building also consisted of spacious rooms, a small theater and a carefully furnished living room.