English: A (so defined) Zoographic Character, said to be an ancient version of the Coptic script according to Athanasius Kircher's 1697 book Turris Babel.

This specific character is said to correspond to the coptic letter Tau, Greek Τ, τ; its mystical meaning is given by Kircher as the "letter of Thoth, or of the God Tautus", who is Mercurius, the Thau of the Jews" (Litera Thoth sive Tauti Dei, id est Mercurii. Thau Hebraeorum). Compare to an Ankh

Please be noted that those above are the interpretations given by Kircher himself, and should not be taken as scientific thruths in the modern sense.

Extracted and cut out from page 233 of the book file; see there and in the previous and following pages for a more extended discussion (in latin).