The resources collected below relate wholly or in very large part to correspondence and – with a few exceptions, mainly in the first section – deal with early modern letters.

Epistolary Centres, Multi-Correspondence Research Projects, and Working Groups

Union Catalogues of Letters

Digital Correspondence Editions

Digital Archives and Catalogues of Correspondence

Individual Institutions

Individual Correspondents and Correspondence Networks

Hard Copy Correspondence Projects

* also includes an online catalogue

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