The National Library of Israel holds a large collection of Jewish marriage contracts. The ketubbot are divided based on rite: Sephardic, Ashkenazic, Italian, Yemenite, and more.
The Stroum Center for Jewish Studies at the University of Washington collects marriage contracts from the Sephardic diaspora.
This marriage contract in the holdings of the Jewish Museum in New York is from Persia.
Columbia University's collections of Ketubbot from Corfu is available here.
The Art of the Ketubbah: Decorated Marriage Contracts from the Library of the Jewish Theological Seminary
by
Shalom Sabar (Compiled by)