This art history video discussion examines Michelangelo Merisi da Caravaggio's "The Supper at Emmaus", 1601, oil on canvas (National Gallery, London).
This art history video discusses Hans Holbein the Younger's "Christina of Denmark", Duchess of Milan, 1538, oil on oak, 179.1 x 82.6 cm (The National Gallery, London).
This art history video discusses Hans Holbein the Younger's "The Ambassadors", 1533, oil on oak, 207 x 209.5 cm (The National Gallery, London).
The National Gallery of Art in Washington, D.C. has an extensive section devoted to educational resources for both educators and students. One example is a pdf or online accessed text on the Dutch Golden Age. This is comprehensive in both history and art objects and is clearly written. There are more images than text, but the sections that are included are instructive. Other topics include the Italian Renaissance, Art since 1950, a module on Arts and Crafts, American Art since the colonial period, etc. Some material is geared toward younger learners, but much of it is appropriate for an introductory, or even next level, art history class. There is no licensing statement, although it is copyrighted. There are teacher resources available as well including assessments and images. Individual teaching packets come with 20 slides, 12 11 x 14 reproductions, a cd with jpgs, and a separate classroom activity guide.
This art history video discussion examines Sir Joshua Reynolds, Lady Cockburn and Her Three Eldest Sons, 1773, oil on canvas.