Your article does a good job fleshing out the main points of the painting, giving a basic description and giving a brief exhibition history. I was actually impressed with the exhibition history and will think about adding a exhibition history page to my artworks Wikipedia page. I also like the fact that you added a link to other works done by Judith Leyster. Nice touch!
I would suggest to make more sections about the artwork. Maybe add a painting materials section under the description heading. I would also suggest possibly changing your description to subject matter. I would also suggest giving background detail on what a masterpiece is or link to a wikipedia page that details that.
The most important thing that I believe that you could improve would be continuing your research and adding more content. Professor Miller told me that the Las Meninas by Diego Vasquez Wikipedia article was an expertly done article so looking there would be good to get some fresh ideas.
Something that you did that I will also do to my own wikipedia page is add a list of the artists artworks. Great job so far!
