A bronze-covered altar five cubits square with a horn at each corner, a courtyard of linen hangings a hundred cubits by fifty, and — in the last two verses — a standing obligation that has nothing to do with construction: bring beaten olive oil so that the lamp burns from evening to morning, always. Of everything specified in these chapters, the horned altar is the object with the firmest archaeological footing. Altars of exactly this form have been excavated across Israel, and one of them, at Beersheba, was found in pieces in a later wall and reassembles to the height this chapter prescribes.