The Mortuary Chapel was designed to be a place where funerals could be held. Over time, few funerals were held there. Instead, the public began using the chapel as a meditative space, and requesting to be buried inside it. The chapel was renovated, a west wing with service room and bathrooms added, and a carillon with bells constructed in 1963. The leaded glass rotunda was capped with a concrete dome to protect it. The addition and carillon were in the Neoclassical style. A north wing was completed in 1979. The Thompson stained glass window was removed, and a door cut through to the new wing. The historic window was relocated to the east wall of the new wing, while a new stained glass window and fountain were placed at the west wall of the wing. The north wing serves as an indoor mausoleum.