Columbia subject headings:
Celsi, Mino--Correspondence.
Christian heresies--Early works to 1800.
Religious tolerance--Christianity--Early works to 1800.
Statesmen--Italy--Siena (Province)--Correspondence.
Harvard subject headings:
Celsi, Mino--Correspondence.
Christian heresies--Early works to 1800.
Religious tolerance--Christianity--Early works to 1800.
Statesmen--Italy--Siena (Province)--Correspondence.
Princeton subject headings: