Templar cipher

The Templar cipher is a geometric substitution attributed to the Knights Templar, active between the 12th and 14th centuries. The Order ran an international banking network — commanderies from London to Jerusalem — and needed to secure bills of exchange between its branches. The cipher would have let a treasurer in Paris guarantee to a recipient in Acre that a sum had been deposited in a French commandery.

Principle

Like Pigpen, the Templar cipher is a monoalphabetic substitution with geometric glyphs. But the reference grid is a pattée cross (as on the Templar standard) divided into compartments:

            ┌─────┬─────┐
            │  A  │  B  │
        ┌───┼─────┴─────┼───┐
        │ M │           │ C │
        ├───┤   Malta   ├───┤
        │ N │   cross   │ D │
        ├───┤           ├───┤
        │ O │           │ E │
        └───┼─────┬─────┼───┘
            │  F  │  G  │
            └─────┴─────┘

(Approximate layout — exact placements vary across historical sources.)

Each letter occupies a cell or portion of the central glyph. The associated symbol is the outline drawn around its position.

Historical origin

Medieval sources lack direct evidence: no authenticated Templar cipher manuscript has survived. What we have comes from 18th and 19th century masonic and esoteric reconstructions claiming to inherit Templar traditions after the Order’s suppression in 1312.

This cipher is therefore stronger in narrative than in documentation: a story of secret orders, hidden treasure, esoteric legacy — almost a trope for initiatory novels.

Variants

• Pigpen — direct cousin, 3×3 grid + X.
• Rosicrucian — another geometric substitution, attributed to the Rosicrucians.
• Masonic cipher — synthesis of Pigpen and Templar, used by Masonic lodges.
• Solomon’s cipher — esoteric variant based on angelic symbols.

Weaknesses

Identical to Pigpen:

• Monoalphabetic substitution — yields to frequency analysis.
• No key: once the method is known, the grid is public.
• Recognizable glyphs at a distance — poorly discreet for covert use.

The 25 glyphs

Full table of Templar glyphs. Letter J is absent — historically merged with I, as was customary in medieval Latin alphabets. At encryption time, any J in the cleartext is automatically folded into I.

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z