Archaeologists cannot ask prehistoric men about their stone tools. So, to make sense of the remains they find in their excavations, archaeologists build typologies to classify them. This blog is about these typologies: their evolution throughout the history of prehistoric archaeology since the 19th century, the ways these typologies were structured, and the scientists who promoted them. It publishes forgotten materials (for example, the Dialektikê journal), bibliographies, presentations on specific typologies, and notes on recent publications.