The Lion Triclinium is one of Petra's remarkable tricliniums, showcasing the intricate Nabataean rock-cut architecture. Located on the way to Ad-Dayr, the façade of the Lion Triclinium is adorned with a frieze of triglyphs and metopes, featuring the head of Medusa at each end. Inside, there are three benches and a baetyl carved into a niche to the left of the doorway. Dating back to the first century AD, its name derives from the two heavily weathered lions carved on either side of the doorway, facing the entrance. There were no graves in the building itself; it was intended for ritual banquets in honor of ancestors or deities. The high, keyhole-shaped door opening resulted from the erosion of a round window in the upper area. Of the three urns originally atop the pediment's corners, the left one is missing. The large baetyl in a niche is carved to the left of the doorway of the facade.  The façade is approached by seven steps. It is apparent that the right side of the doorway features a pilaster, whereas the left side may have had an inset one.