📍 1. Town Planning

The Indus Valley Civilization is known for its remarkably advanced urban planning, unmatched in many contemporary civilizations.

🔹 Key Features:

• Planned Cities (Grid System):
  • Streets intersected at right angles, forming a grid pattern.
  • Main roads were wide, straight, and well-laid.
• Division of Cities:
  • Citadel (Upper Town):
    • Elevated and fortified
    • Contained public buildings like granaries, assembly halls, and the Great Bath
  • Lower Town:
    • Residential area where common people lived
• Building Materials:
  • Uniform use of baked bricks (standard size ratio 1:2:4)
  • Strong and durable construction
• Houses:
  • Multi-room houses with:
    • Courtyards
    • Bathrooms
    • Private wells in some houses
  • Doors often opened into lanes rather than main streets (for privacy)
• Public Buildings:
  • Great Bath at Mohenjo-daro
  • Granaries at Harappa
• Important Cities:
  • Harappa
  • Mohenjo-daro
  • Dholavira
  • Kalibangan

🔹 Significance:

• Reflects centralized planning and governance
• Indicates a high degree of civic sense and organization

🚰 2. Drainage System

The drainage system of the Indus Valley Civilization was one of the most advanced in the ancient world.

🔹 Key Features:

• Well-constructed drainage network:
  • Drains ran along main streets and were interconnected
  • Made using bricks and mortar
• Covered Drains:
  • Covered with stone slabs or bricks
  • Prevented clogging and ensured hygiene
• Household Drainage:
  • Each house had:
    • A bathroom
    • A drain connected to street drains
• Soak Pits and Inspection Holes:
  • Used for collecting waste and cleaning drains
  • Allowed easy maintenance
• Separate Water Systems:
  • Drinking water and waste water systems were often separate

🔹 Significance:

• Shows advanced knowledge of sanitation engineering
• Indicates strong focus on public health and cleanliness

🐂 3. Seals

Seals are one of the most important archaeological findings of this civilization.

🔹 Characteristics:

• Mostly made of steatite (soapstone)
• Typically square or rectangular in shape
• Polished and finely carved

🔹 Engravings:

• Animal figures:
  • Bull, unicorn (most common), elephant, rhinoceros, tiger
• Script:
  • Short inscriptions in Indus script (undeciphered)

🔹 Types of Seals:

• Animal seals
• Human or deity seals
• Composite figure seals

🔹 Purpose:

• Used as:
  • Trade identifiers (like stamps)
  • Marks of ownership or authority
• Possibly used in:
  • Administrative and religious activities

🔹 Famous Seal:

• Pashupati Seal (proto-Shiva figure sitting in yogic posture)

🔹 Significance:

• Reflects artistic excellence
• Indicates existence of writing system and trade regulation

🚢 4. Trade and Commerce

Trade was a major strength of the Indus Valley economy.

🔹 Types of Trade:

• Internal Trade:
  • Between cities like Harappa and Mohenjo-daro
• External Trade:
  • With regions like:
    • Mesopotamia (called “Meluhha” in Mesopotamian texts)

🔹 Trade Routes:

• Land routes: Through Afghanistan and Central Asia
• Sea routes: Via Arabian Sea

🔹 Important Port:

• Lothal
  • Had a well-developed dockyard

🔹 Major Trade Items:

• Exports:
  • Cotton textiles (India is one of the earliest producers)
  • Beads and jewelry
  • Pottery and metal tools
• Imports:
  • Gold (from South India)
  • Silver, copper, lapis lazuli (from Afghanistan/Iran)

🔹 Weights and Measures:

• Standardized system (binary system: 1, 2, 4, 8, 16…)
• Made trade fair and organized

🔹 Mode of Trade:

• Mostly barter system
• No clear evidence of coinage

🔹 Significance:

• Shows economic prosperity
• Indicates international trade connections

• The Indus Valley Civilization was:
  • Highly urbanized
  • Technologically advanced
  • Economically strong
• Its town planning and drainage system were far ahead of their time
• Seals and trade networks highlight its cultural and commercial sophistication