Metropolitan Museum of Art
Metropolitan Museum of Art: American Portrait Miniatures of Eighteenth Century
The Metropolitan Museum of Art provides this informative page on American portrait miniature paintings of the eighteenth century.
Brown University
Brown University Libary: Persian, Mughal, and Indian Miniature Paintings
A browsable gallery of Perisan, Mughal, and Indian miniature paintings from the Minassian Collection at Brown University. Includes a history of the collection and essays on the paintings.