The head of John the Baptist

I remember seeing this sculpture in the Rodin room at the Palace of the Legion of Honor, decades ago when I went there pretty regularly. I thought it was a little gruesome, and I didn't understand the story behind it -- I recall that the card describing the piece seemed to assume that everyone knew the story of John the Baptist. I didn't even know who he was.

Fast forward thirty years, and I visit the museum again. I see the sculpture, but this time I know the story. In fact, I've seen many pieces of art over the years depicting some part of the story.

I just noticed the other day that the name of Herodias's daughter -- the one who asked for John the Baptist's head -- is not named in the Bible. But I've seen so many depictions in art, and I've heard the story. How did we know her name? It turns out she is named in the Jewish Antiquities, but not in the New Testament.