Arthur Lincoln Frothingham, Jr. (1859 – July 1923) was an early professor of art history at Princeton University and an archaeologist.
Together with Allan Marquand, Frothingham worked to rewrite Moritz Carrière's Bilder Atlas as a fourth volume of the Iconographic Encyclopedia (1887).
Frothingham also studied the topography of Latium and was intertested in an excavation at the site of Norba, but he was not granted a permit for fieldwork.
When Marquand returned from a year at the American Academy in Rome, he found that Frothingham was teaching yet another new course: Italian art of the Middle Ages.
His name was removed from the faculty rolls the following year and though he remained in the city of Princeton, New Jersey, the rest of his life, publishing as a private scholar, he never again taught.