The guy who wrote this article is really dumb. He knows nothing about art. He said it was painted in the Baroque era, when it was painted in Byzantine era (about 200 years before the Baroque era). The importance of this is the Catholic Church was going crazy with embellishing their Churches with iconography, rather than covering it up like the protestants were. They lavished paintings in gold-leaf and commissioned tons of art during this time. Lots of it contained nudity. And, more importantly, the art work of the Baroque era was very realistic, and normally painted from real models. During the Middle ages, artists did not paint from real life, they painted from memory. They'd probably never even seen abs. The artist probably didn't bother too look at his own stomach either. Explains the weirdness in the tummy area.
Oh yeah, and they get super pissed when you catch them in their misinformation.
I said I had a masters degree so he wouldn't be like "Oh, so you only took 6 art history classes, you don't know anything"
Instead, he mocked the degree and said the painting was still garbage. He didn't even correct his mistake.