Thhis building was originally discribed as Garden Tomb then as Garden Tomb and recently is a Garden Triclinium. Anyway its function is as yet uncertain. There were no burials. It may have been used to supply the water for its rituals, or to supply water to Wadi Farasa
Sources:
- Leigh-Ann Bedal,"The Petra pool -complex: A Hellenistic paradeisos in the Nabataean capital (results from the Petra “Lower Market” survey and excavation, 1998)" (2000). Dissertations available from ProQuest. AAI9989568.
https://repository.upenn.edu/dissertations/AAI9989568 - https://visitpetra.jo/DetailsPage/VisitPetra/LocationsInPetraDetailsEn.aspx?PID=23.
- https://universes.art/en/art-destinations/jordan/petra/wadi-farasa/garden-triclinium