Santa Marta Dominadora, or Filomena Lubana, is a character of the Dominican Vudú, a syncretic religion of Caribbean origin. She is syncretized with Saint Martha (Christian) the female dragon slayer.
I discovered her years ago thanks to some friends that took me to see a folkloristic shop in Genova (Italy). The shop sells mainly vegetables, but also (secretly?) potions, amulets and the weirdest stuff you will ever find.
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