The renowned Theban queen Nefertari, wife of Ramses II, has the most ornate tomb (number 66) but it is not always accessible.
The tomb of Queen Nefertari can only be accessed on Mondays and Tuesdays. 
mnli hypothesis: The tomb of Queen Nefertari can only be accessed on Mondays and Tuesdays.  premise: The renowned Theban queen Nefertari, wife of Ramses II, has the most ornate tomb (number 66) but it is not always accessible.