In my limited experience such an interrogation of a painting by website has never been attempted before and I am optimistic that three of the four questions will be answered. The What and the Who are really a single question since a scene that is described without identifying its many figures is highly unlikely. I further think that the painter's name or his studio will be revealed by underdrawing comparisons as data bases of underdrawings are slowly developing. That leaves question 4-the hardest. But someone or some people took great care to preserve the painting in order to hang it somewhere possibly as one of a series of similar paintings recording a significant event and thereby telling a story.
Finally, the more this website is visited the better, so please pass on the link (www.oldmasterdetective.com) to your family and friends! You can use the sharing tools on the page to send the link via Facebook, Facebook Messenger, Whatsapp, LinkedIn, Twitter or via email.