The Capitol Pylon programme identifies Wisdom, Justice, Power and Mercy as the constant guardians of the law. It places Wisdom and Justice to the east, and Power and Mercy to the west.
Alexander’s History of Law · “The Majesty of the Law”
Wisdom, Justice, Power and Mercy: Constant Guardians of the Law
An archival programme sheet for the Capitol Pylon identifies the four constant guardians of the law.