Ambigrams are nearly forgotten by people untill Dan
Brown's book "Angels and Demons" refreshed everyone's memory and
brought the amazing artform back to this world.
Ambigram is a typographical design or artform that may be
read as one or more words not only in its form presented but also
when rotated 180 degrees. It is a truely fasinating thing as you
never know what's gona come out of it.