Gradeshnitsa tablets
The Gradeshnitsa tablets or plaques are clay artefacts with incised marks. They were unearthed in 1969 near the village of Gradeshnitsa in the Vratsa Province of north-western Bulgaria. Steven Fischer has written that "the current opinion is that these earliest Balkan symbols appear to comprise a decorative or emblematic inventory with no immediate relation to articulate speech." That is, they are neither logographs nor phonographs." The tablets are dated to the 4th millennium BC and are currently preserved in the Vratsa Archeological Museum of Bulgaria.
