The black cat has long been associated with witches. 
Many  superstitions have evolved about cats. Itwas believed that 
witches could change into cats. Some people also believed that
cats were the spirits of the dead. 
One of the best known superstitions isthat of the black cat. 
If a black cat was to cross your path you would have to turn
around and go back because many people believe if you continued bad luck would
strike you.