| Year | Decision | Comments |
| 2008 | Requested by State Party to not be examined at WHC session | No separate nomination, is now included in the Land of Frankincense WHS |
| 1988 | Tentative list | Submitted as tentative site by State Party |
| 1987 | Rejected | Important for intercontinental exchange but not acceptable in its current state - later would reconsider with more evidence |
Have you been to Khor Rori (ancient Sumhuram)? Share your experiences!