keskasjakirjed
Keskasjakirjed is a term used in Estonian historiography to denote the corpus of medieval written records from roughly the 12th to the 15th centuries that survive in the Baltic and Nordic regions. The phrase is not tied to a single manuscript collection but to a wide range of sources that illuminate governance, religion, society and economy during the Middle Ages. The term emphasizes the era rather than a specific archive, and it is used to discuss types of documents rather than a fixed canon.
The material commonly classified as keskasjakirjed includes legal charters and privileges, annals and chronicles, ecclesiastical registers,
Scholarly importance of keskasjakirjed lies in their role as primary sources for reconstructing medieval institutions, law,