This podcast devotes itself to all things Constantine and the history of who owned the tapestries. Who did them? Peter Paul Rubens, Pietro di Cortona, and multiple patrons. The acoustiguide describes scenes and gives historical truths behind them. However, you will not see them yourself if you download this podcast.
I found this for free on Kindle. An art historian I have never heard of. For understandable and bad reasons, this man has gone completely under the radar. Understandable meaning that he had very outdated views of women. Bad because he recorded first hand accounts of some of major players of the modern art movement. Edouard Manet? He had dinner with this man! Edgar Degas? He visited his studio!