Whereas recent scholarship has analysed and theorized the practice of public diplomacy in modern international relations, early modern diplomacy is still often thought of in terms of peer-to-peer interaction and secrecy. This article seeks to show that public diplomacy was a central aspect of early modern international relations as well. While examining how, when, and why early modern diplomats communicated with foreign audiences, it argues that early public diplomacy opened up spaces for public debate and created transnational issues, and is therefore central to the history of news and the development of the public sphere.