Which ancient Mesopotamian civilization, known for its sophisticated legal code, also developed one of the earliest known forms of organized labor unions for its scribes?

Which ancient Mesopotamian civilization developed a sophisticated legal code, predating Hammurabi's by centuries, that codified laws related to debt, property, and family matters?

Which Roman magistracy was specifically tasked with the oversight, repair, and administration of the vital aqueduct systems supplying water to the city of Rome?