In Catanzaro v. Wasco Products, Inc., 339 Pa. Super. 481, 489 A.2d 262, 265 (Pa. Super. 1985), the Superior Court considered whether a skydome or skylight was "so annexed" to a school building as to constitute chattel that is always realty. The Court compared the skylight to a window, which was plainly part of the realty of the building. It noted that the skylight was so integrated into the building that its detachment would cause material injury to the building. Accordingly, it concluded that skylights constituted realty.