It's part of the bank's Museums on Us program, which offers free weekend access to a range of museums on the first full weekend of each month this year.
Both Bank of America and Merrill Lynch credit and debit cardholders can get in free at the downtown museum on Key Highway on Saturday and Sunday.
The program now has a mobile site that gives a full list of all 150 museums in the program.
The bank says its program gives customers free access to cultural experiences across the U.S. at some of the nation's most celebrated institutions, including art, children's and history museums, aquariums and science centers.
If you go, bring the credit card and a photo ID. (Free admission for cardholders only).