51 Irresistible Libra Tattoos (With History & Meaning) . The libra is dated back to ancient Greek days. It’s associated with the goddess Themis and is known for being a symbol of justice. A classic libra tattoo is of the goddess Themis or Justicus holding the scales and symbols. The libra is part of the Zodiac and is the seventh sign. It’s a symbol that personifies the scales of justice and is the astrology sign for people who were born between August 23-September 23rd.