An Ambigram is a sentance or a single word that is written in such way, that it becomes readable even if you rotate it. John Langdon is a father of ambigrams. In 19070s, trying to do with words what Escher does with images, he invented what came to be known as “ambigrams”. He did work for The Da Vinci Code movie, and to my knowledge, he was an inspiration to Dan Brown for his main character called Robert Langdon. John’s ambigrams apeared not only in the movie, but also in original David Brown’s books: “Angels & Demons” and “The Davinci Code”. Check out these cool ambigrams he created, and don’t forget to visit his website for more amazing illusion examples.