Justitia, or Iustitia, was the roman goddess of justice. She is often referred to in modern times as Lady Justice.
Justitia has become a symbol of Justice in western culture. She is usually depicted holding a sword and scales, She is also often depicted with a blindfold, meant to symbolize a lack of prejudice demanded by justice, that justice is blind — though the blindfold is attributed to Fortuna, the goddess of luck, in Roman mythology.
Justitia is the equivalent of the Greek goddess Dike, though she also borrows attributes from Dike’s mother, Themis.