Tărtăria tablets

From the longer English Wikipedia page 
The Tărtăria tablets /tərtəria/ are three tablets, reportedly discovered in 1961 at a Neolithic site in the village of Tărtăria (about 30 km (19 mi) from Alba Iulia), in Romania.
The dating of the tablets is difficult as they cannot be carbon-dated and the stratigraphy is uncertain, but they may date to around 5300 BC.Most of the scientists, analysing the signs, are for a much newer age, around 2,750 B.C., maximum 3,300 B.C. (which is the beginning of the period of sumerian proto-writing).
The tablets bear incised symbols and have been the subject of considerable controversy among archaeologists, some of whom claim that the symbols represent the earliest known form of writing in the world. The symbols are thought to be Vinča symbols although some scholars have considered them to be Sumerian
In 1961, members of a team led by Nicolae Vlassa, an archaeologist at the National Museum of Transylvanian History, Cluj-Napoca in charge of the site excavations, unearthed three inscribed but unbaked clay tablets, together with 26 clay and stone figurines and a shell bracelet, accompanied by the burnt, broken, and disarticulated bones of an adult male.
Two of the tablets are rectangular and the third is round. They are all small, the round one being only 6 cm (2½ in) across, and two — one round and one rectangular — have holes drilled through them.
All three have symbols inscribed only on one face. The unpierced rectangular tablet depicts a horned animal, an unclear figure, and an vegetal motif, a branch or tree. The others have a variety of mainly abstract symbols. The purpose of the burial is unclear, but it has been suggested that the body was, if not that of a shaman or spirit-medium, that of a local most respected wise person.
The Romanian Wikipedia page is 
Category:Undeciphered inscriptions
Category:Ancient World
Category:20th century