Horse horseshoe is a symbol of luck, but according to some only if directed upwards, if directed downward, lucky escape.
In popular culture horse horseshoe protects against evil spirits and bring good luck into the house.
In the Christian faith, was asked Sf.Dunstan devil's hoof shoe sole, St Dunstan met the requirement, but Satan caused him terrible pain so that it has promised to never go where he sees a horseshoe.
For horseshoe to have effect must be mounted above the entrance door or door frame.
Horseshoe symbol is recognized in many cultures, having the significance or meaning fertility due crescent shape resembles vitality as two horns.