From then until 1812, when the intrepid Swiss explorer John L. Burckhardt rediscovered Petra, it was almost totally forgotten.
Petra grew in name and popularity until 1812 when a Swiss explorer destroyed it.
mnli hypothesis: Petra grew in name and popularity until 1812 when a Swiss explorer destroyed it. premise: From then until 1812, when the intrepid Swiss explorer John L. Burckhardt rediscovered Petra, it was almost totally forgotten.