The Map Room was a room in Tanis that revealed the location of the Well of the Souls, the resting place of the Ark of the Covenant, on a scale model of the city but only when sunlight passed directly through the headpiece to the Staff of Ra.

First uncovered by the Nazis and their diggers, René Belloq designed a replica of the headpiece[1] based on the inscription of the original that had scarred its shape onto the palm of Arnold Toht in Nepal. Belloq wrote his calculations on the model[1] and aquired a location, unaware that the original piece had more directions written on the reverse. As such, he went digging in the wrong place.

Indiana Jones, in possession of the true headpiece, later visited the room with the Staff of Ra, in itself just a carefully measured shaft of wood, inserted it into the correct groove on the floor and waited for sunrise.

The sunlight hit the headpiece's crystal center, shining a beam of red light upon the model of the city, pointing to the Well of Souls.


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