• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 44 · state; law; political life
• 44E · government services, public services
• 44E1 · water-supply (~ public services)
• 44E13 · aqueduct (~ water supply)

44E131 · pipe system (~ water supply)