13 named features carry the IAU descriptor Facula — a bright spot on Ganymede, out of 61 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 13 faculae with a recorded origin, one category covers them all, led by Egypt.
Every one has its own page, on the surface it sits on.
The same descriptor is used on 4 other worlds, for 48 more features.