The Valley of Royalty was an ancient valley on Duro where the Duros buried many of their most celebrated rulers, including Rana Mas Trehalt. There were many secret catacombs and caves in the Valley, hiding a wealth of both historical information and valuables. The Valley was flooded with toxic waste when the Tiercam Dam broke, almost killing several Duros archaeologists.
- The Essential Guide to Characters
- Star Wars Encyclopedia
- A Guide to the Star Wars Universe, Third Edition
- The University of Sanbra Guide to Intelligent Life: The Duros"—Star Wars Gamer 2 "
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- Suns of Fortune