غطيّت جدران المَمَّر بالنقوش المرسومة على مدى طوله، والبعض منها تم اكتشافه خلال الحفريات التي جرت في منتصف التسعينيات من الجزء العلوي من الممر.
The walls of the causeway were covered with painted reliefs throughout, some of which were discovered during the excavations started in the mid-1990s of the upper part of the causeway.