The primary written texts this atlas holds as artifacts: treaties, charters, declarations, constitutions and comparable instruments a historian cites as evidence of what a state or its people did, rather than narrates as an event in its own right. A document is filed here because it is the artifact itself, not the happening that produced it, which is the Events category's own territory, and not the polity or figure that produced it, each its own category. This category's own subcategory tree is not yet built; fifteen live members is small today, and real-world coverage of historical documents runs into the thousands, so structure here is expected to grow.