The face and the backside of a copy of the Gradeshnitsa tablet

The Gradeshnitsa tablets (Bulgarian language

Bulgarian language

Bulgarian is an Indo-European language, a member of the Slavic linguistic group.Bulgarian, along with the closely related Macedonian language, demonstrates several linguistic characteristics that set it apart from all other Slavic languages such as the elimination of case declension, the...

: ), unearthed in 1969 in north-western Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

 (Gradeshnitsa

Gradeshnitsa

Gradeshnitsa is a village of the Vratsa Province, Bulgaria.The village is notable for the Gradeshnitsa monastery , and for the neolithic Gradeshnitsa tablets now kept in Vratsa museum....

 village, Vratsa Province

Vratsa Province

Vratsa Province , former name Vratsa okrug) is a Bulgarian province located in the northwestern part of the country, between Danube river in the north and Stara Planina mountain in the south. It is named after its main town - Vratsa...

), are, along with the Tărtăria tablets

Tartaria tablets

The Tărtăria tablets are three tablets, known since the late 19th century excavation at the Neolithic site of Turdaş in Transylvania Romania, by Zsófia Torma, which date to around 5300 BC...

, an important testimony of late neolithic

Neolithic Europe

Neolithic Europe refers to a prehistoric period in which Neolithic technology was present in Europe. This corresponds roughly to a time between 7000 BC and c. 1700 BC...

 proto-writing known as the Vinča signs. The tablets are dated to the 5th millennium BC and are currently preserved in the Vratsa Archeological Museum of Bulgaria. In 2006, these tablets were the subject of attention in Bulgarian media due to claims made by Stephen Guide, a Bulgarian-American of the Institute of Transcendent Analysis, Long Beach

Long Beach, California

Long Beach is a city situated in Los Angeles County in Southern California, on the Pacific coast of the United States. The city is the 36th-largest city in the nation and the seventh-largest in California. As of 2010, its population was 462,257...

, California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, who claimed he had deciphered the tablets.