http://agathe.gr/democracy/sources_and_documents.html
Sources and Documents Our understanding of the workings and history of Athenian democracy comes from a variety of sources. Most useful, perhaps, are the ancient literary texts that survive, many of which ... In a speech of Deinarchos against Demosthenes delivered in 323 B.C., we learn that a document was deposited "in the keeping of the Mother of the Gods, who is established as guardian for the city of all rights recorded in the documents" (Deinarchos Against Demosthenes 86).
