History of Music Theory, website for SMT Interest Group
Theoria: Historical Aspects of Music Theory, Journal
Archive of the Dutch journal of Music Theory (most articles in English, open source), currently Music Theory and Analysis, library access
Thesaurus Musicarum Latinarum (TML)
Robert Gjerdigen's Partimento website
Early Music Sources, with youtube tutorials
Basic introduction to Partimento
The Learn Partimento Podcast, audio; The Learn Partimento Podcast youtube
Explanatory videos on improvisation and Partimento by En blanc et noir
Vasili Byrons improvises on schemas
Daniel DiPaolo, Moritz Hauptmann’s Opuscula: Selected Essays in Translation with Commentary
Nathan John Martin, “History for Theorists,” MTO 25/3 (2019)