Stigma (letter) Stigma (letter) Stigma (ϛ) is a ligature of the Greek letters sigma (Σ) and tau (Τ), which was used in writing Greek between the Middle Ages and the 19th century. It is also used as a numeral symbol for the number 6. In this unrelated function, it is a continuation of the old letter digamma (originally Ϝ, cursive form ), which had served as a numeral since antiquity and was conflated with the σ-τ ligature in the minuscule handwriting of the Middle Ages. The στ ligature (, ) was one of many ligature forms that came into widespread use as
Letter of Peter to Philip discourse upon the nature of Christ. It was probably written in the late 2nd century or the beginning of the 3rd, originally in Greek, but translated into Coptic in the Nag Hammadi text. The title of the Letter is originally "The Letter of Peter Which He Sent to Philip", but is commonly simplified to "The Letter of Peter to Philip". Another copy of the letter has more recently been found in the Codex Tchacos and is titled plainly as "The Letter of Peter to Philip". The Nag Hammadi Library is a collection of thirteen codices that was found near the