Apotropaic magic
Brigid's cross
"Saint Brigid's cross" by Culnacreann - Own work. Licensed under CC BY 3.0 via Commons - https://commons.wikimedia.org/wiki/File:Saint_Brigid%27s_cross.jpg#/media/File:Saint_Brigid%27s_cross.jpg
Hamsa
"HamsaS" by Gilabrand at en.wikipedia. Licensed under CC BY 3.0 via Commons - https://commons.wikimedia.org/wiki/File:HamsaS.jpg#/media/File:HamsaS.jpg
Eye bead
The ancient blue and white Nazar boncuğu symbol, a stylised eye thought to avert the evil eye, appears on this Turkish Airlines airplane.