Perhaps the secret of the eighteenth century can be the key to finding the Holy Grail. The experts, who deciphered the secret codes Nazis, trying to unravel the mystery of the ten letters, which for 250 years baffled mankind — DOUOSVAVVM, — says "Associated Press". Former code decoder of the Information Centre of the British during the Second World War at Bletchley Park are now trying to decipher the mysterious inscription on the monument of the eighteenth century, located in one of the English country estates. According to legend, the inscription reveals the whereabouts of the Holy Grail. Mathematician Oliver Lawn, conducting research with his wife, Sheila linguist, shared: "It is clear that this inscription in Latin or Greek, is a reference to a historical event." A mysterious inscription carved on a marble monument, located in the gardens of Shugborough House (central England), in the ancestral home of Lord Lichfield photographer. The basis of the monument served as a painting by French artist Nicolas Poussin: the engraving depicts three shepherds pointing to a gravestone inscription. Under the image written letters — DOUOSVAVVM Some believe that the monument holds the key to finding the Holy Grail — the cup from which Jesus drank at the Last Supper. The family of Anson that built Shugborough Estate, interested in the history of the secret of the medieval Order of the Knights Templar. It is assumed that its members were the keepers of the Holy Grail. Russell Getings of Shugborough reported that the engraving made important changes that are not on the canvas Poussin, and that these changes may hold the key code for clues.