Pigpen

Old substitution cipher, said to be used by Hebrew rabbis and the Knights Templar.

Pigpen places letters in "#" and "X" diagrams, then uses the nearby lines and dots as the symbol for the encoded letter. This comes in two main varieties.

Original Version
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Modified Version
ABCDEFGHINOPQRSTUVJKLMWXYZ