"Codex Germaniae diplomaticus", worinnen viele vortreffliche und zum Theil noch niemahls zum Vorschein gekommene, auch zur Illustration der teutschen Reichs-Historie und "juris publici" höchstnöthige "documenta" enthalten sind... ans Licht gegeben von Johann Christian Lünig

The Codex Germaniae diplomaticus was compiled by the German jurist and historian Johann Christian Lünig and published in the early 18th century, specifically between 1732 and 1733 in Frankfurt and Leipzig. Lünig, a prolific archivist of legal and political documents, intended this multi-volume collection to serve as a comprehensive repository for the constitutional and diplomatic history of the Holy Roman Empire. By gathering rare and previously unpublished documents, treaties, and legal charters, the work aimed to provide scholars and jurists with an essential foundation for the study of the German state's public law, known as ius publicum.

The design of the Codex reflects the rigorous academic standards of the Enlightenment era, emphasizing exhaustive documentation and systematic organization. Lünig’s approach was designed to facilitate the critical examination of imperial politics, acting as an authoritative reference for the complex legislative framework of the era. The work was well-regarded among contemporary legal historians and diplomats for its sheer scale and the effort required to aggregate such fragmented archival material. It remains a significant primary source today for researchers exploring the administrative mechanisms and historical evolution of early modern Germanic territories.