The toolkit of medieval Russia stone carvers

The paper reports on attribution of rare stone items called pleshchkas, i. e. special stone notebooks, an equivalent of medieval wax tablets used for making notes and drawings. They were part of stone carvers' toolkits and were used in training and improving techniques of carving, drawing and making inscriptions on stone. An inscription on one of the items was used to identify the items as a series of finds and understand how stone carvers called them (pleshkas, or pleshchkas).