The J. Paul Getty Museum in Los Angeles, California keeps a thorough record of their past exhibitions on their website, and it is worth a visit for research on a variety of artistic subjects.
Images in Light: Newly Acquired Stained Glass was an exhibition that ran from 2003–2004, and focused on stained glass pieces from the Gothic and Renaissance periods. The comprehensive retrospective includes detailed images and summaries of the exhibition subjects. It also has audio recordings of discussions of some of the showcased pieces.