The statue of John of Nepomuk on the Charles Bridge has two bronze plaques at its base. One of which is considered good luck if you touch it. It is said that if you rub the one depicting John being thrown from the bridge, you will one day return to Prague.
John of Nepomuk is a national saint of the Czech Republic, who was drowned in the Vltava river at the behest of Wenceslaus, King of the Romans and King of Bohemia.
Touching the plaque on the left has no traditional meaning so its puzzling why the dog is shiny. It may be that over the years, as people queued to touch the depiction of John, they started touching the dog and it became shiny. Not knowing any better, other visitors may have followed suit.
Lady touching the right plaque, wrong figure.
So, touching this is good luck for…?