Putnam and Wood have noted the difficulty in understanding how the name Rhedae could have been changed to Rennes-le-Château; and Rhedae was cited as being "located at the crossing point of four major roads: how could this possibly be the case at Rennes-le-Château on its isolated hilltop?"
Putnam dan Wood telah mencatat kesulitan dalam memahami bagaimana nama Rhedae dapat diubah menjadi Rennes-le-Château; dan Rhedae disebut sebagai "terletak di titik persimpangan empat jalan utama: bagaimana mungkin ini menjadi kasus di Rennes-le-Château di puncak bukit yang terpencil?"