The museum has put up a $10m reward in exchange for information leading directly to the safe return of the stolen works.
The story of the Isabella Stewart Gardner Museum theft is the subject of a new Netflix documentary, This Is a Robbery, released on Wednesday (7 April).
The men proceeded to commit what has been dubbed the biggest art heist in history.
The museum asks that anyone with information about the stolen artworks contact its director of security Anthony Amore at +1 617 278 5114, or email reward@gardnermuseum.org.