The ancient symbol of a protective hand is common to Christians, Jews, and Muslims. This figure, the Mano Poderosa or All-Powerful Hand, from the late 1800s, is a specifically Catholic version of its Roman predecessor. The five small figures atop the fingers are: Baby Jesus on the thumb; St. Joseph on the index finger; the Virgin Mary on the middle finger; St. Joachim (Mary’s father) on the fourth finger; and St. Anne (Mary’s mother) on the pinkie.
Smithsonian National Museum