Series I: General, Political and Historical Correspondence
Edited by the Leibniz-Archiv / Leibniz-Forschungsstelle Hannover.
Begun in 1923 with volume 1 (second reprint 1986). Volumes 3, 9, 11, 12 and 14 to 25 are available online.
The correspondences published in Series I cover a broad spectrum of subjects and areas of activity. Among other aspects, they concern Leibniz's official business and personal affairs, illuminate his involvement in political and confessional matters and in the organisation of scientific institutions, reveal his manifold activities in historical research and provide deep insights into the functioning of networks of learned correspondence.