Continuing with the series on superstitions:
Black cat - In ancient Egypt, the Goddess Bast was a black, female cat. Christians, wanting to rid society of all traces of other religions, convinced the ignorant that black cats were demons in disguise and should thus be destroyed. In the process, they also destroyed the kindly ladies who cared for the cats, believing them to be witches. Being demons, a black cat crossing your path would create a barrier of evil, cutting you off from God and blocking the entrance to heaven.
Model - Merlin