Glass orbs called "witch balls" are hung in the window to protect homes from evil spirits. The witch ball attracts any evil spirits that may be lurking about. Once lured to its beauty, negative energies are trapped inside the witch ball where they can do no harm.
Other names for the witch ball include fairy orbs, spirit balls, and gazing balls. An outdoor version is the reflective garden globe found in gardens that sit upon pedestals amidst the flowers.
image © Phylameana lila Desy