Today, people hang horseshoes for  good luck without realising that a century or more a go they were considered powerful  apotropaics—or ‘warding away’ objects against witches. Here we have a representation of two separate traditions: because iron weapons aided the Iron Age Celts to vanquish the bronze-using peoples who proceeded them, the belief arose that iron was a powerful protection against earlier inhabitants & their gods, which in time became represented by faeries, goblins, witches ect.—therefore iron was a protection against witches. 🧙🏻‍♀️ The second tradition is connected with the  moon goddess—the horseshoe resembles a  crescent moon so a house with this talisman was under the protection of the moon goddess. 🌚🍀🤞