2224: Lunate Sigma Jan 16, 2021

The Greek letter sigma is special in its design in a number of ways. It is the only to have 3 forms: Σ, σ, and ς (the last only found at the end of words), but even these are not the only way it's looked. The Lunate Sigma used in Greek of the Hellenistic period, was written in a C-like shape, now known as the Lunate Sigma (uppercase Ϲ, lowercase ϲ) called as such in reference to the Moon. This should not be confused for the Latin letter C/c. It only has two forms, laking the distinct word-final form that is found today. These days, it is mostly found in religious contexts or other decorative fonts.