The word diptych (from Gk δίπτυχον; δίς = twice; and πτύσσω = to fold) refers to an object formed by the joining of two superimposed tablets that were bound together by strings, rings, or hinges and used for writing. In antiquity, these tablets were made of various materials such as ceramics, wood, ivory, bone, or metal. The inner surface had a high frame and was covered with wax, a material upon which the people o…