The Preacher Eleazar Swalmius is a 1637 oil-on-canvas painting by the Dutch artist Rembrandt. It is currently owned by the Royal Museum of Fine Arts in Antwerp. The painting has been certified a real Rembrandt. The painting was listed in 1727 in the catalog of the Duke of Orléans collection, as a portrait of an Amsterdam mayor by Rembrandt. It remained in the noble family's possession until 1792, when Duke Louis-Philippe-Joseph sold the entire collection to finance his political career and pay off debts. The painting passed through several English collections into the hands of the Bourgeois brothers, art dealers from Cologne, who sold the painting as an original Rembrandt to the museum in 1886. The painting was stored away for a long time due to doubts cast over its authenticity.