His only signed and dated work is the funeral monument of the family d'Ennetières in the Cathedral of St. Michael and St. Gudula of Brussels. It consists of two superimposed monuments which commemorate two individuals from the same lineage and were made at different times.Wendy Frère et Géraldine Patigny, Jan Van Delen (ca. 1635-1703). Catalogue raisonné, projet de recherche, KIK-IRPA, 2014-2015 Graftombe van de familie d'Ennetières record at KIK-IRPA The epitaph for Jacques d’Ennetières which is in the upper part of the monument is documented through a contract including a modello dated 27 April 1675. At the centre of this epitaph is a marble slab with a funerary inscription surrounded by a molded gilded wooden frame, with eight arms of noble families. Two allegorical figures flank the marble slab: Vigilance and the Prudence, which are rendered in an idealized form. Vigilance, on the left, holds a palm in her hands and at her feet stands a rooster. On the right is Prudence who originally held a mirror in her left hand, which has now disappeared. At the top of the structure stands the bust of Jacques d’Ennetières inside a niche. He is represented with a worried look, wrinkles at the corner of his eyes, a sunken nose and wavy medium-length hair falling on his shoulders. The memorial of his son Philippe-François d'Ennetières, executed in 1690, carries van Delen's signature on the left-side of the base of the sarcophagus. It is in the form of a triumphal arch delimited on the sides by large pilasters. In the center of the structure, the epitaph of the deceased in white marble is framed by black marble and a series of sixteen coats of arms. The inscription is surmounted by a pediment itself topped by the coat of arms of sarcophagusthe deceased and his wife, Marie Obert. The whole is supported by two dogs. Below the epitaph, a bust of Philippe-François d'Ennetières is sculpted in bass-relief, inserted in a medallion created by a gilded wooden frame decorated with laurel leaves. He is represented turned three quarters to the right and wearing a wig with curls falling down his shoulders and a shirt with an openwork lace jabot and a coat. The upper part of the medallion is covered with a white double-foiled sheet supported by two angels.
