"Barriera" was a popular 16thC Italian dance (or so it seems, from the number of sources that record it). It came up in conversation, because we were talking about having Combat at the Barriers for our upcoming event. We practiced the version for one couple, from Caroso's Il Ballarino.
In the hour after the open dance class Mistress Katherina Weyssin looks at some more difficult material with her advanced students. All are welcome to stay and watch; participation is by invitation, and may depend on the style.