Wonders of the ancient world

Colossus

Prerequisite: Bronze working Cost: 200 Shields Effect: City where Colossus is built generates an extra unit of trade in every square that is already producing trade. Expires: Discovery of Flight

Great Library

Prerequisite: Literacy Cost: 300 Shields Effect: Civilization automatically receives any advance discovered by two other civilizations. Expires: Discovery of Electricity

The Great Wall

Prerequisite: Masonry Cost: 300 Shields Effect: Acts as city wall in all friendly cities. Doubles attack atrength vs Barbarians. Enemy civilizations are forced to offer cease fire or peace. Expires: Discovery of Metallurgy

Hanging gardens

Prerequisite: Pottery Cost: 200 Shields Effect: Makes 3 content citizens happy in city where it's built, and one content citizen happy in all other friendly sities. Expires: Discovery of Railroad.

The Lighthouse

Prerequisite: Map making. Cost: 200 Shields Effect: Trirenes lose chance of being lost at sea. All other ships have their movements increased by one. All new ships receive veteran status. Expires: Discovery of Magnetism.

Oracle

Prerequisite: Mysticism. Cost: 300 Shields Effect: Doubles effectiveness of temples. Expires: Discovery of Theology.

Pyramids

Prerequisite: Masonry. Cost: 200 Shields Effect: Counts as a granary in every city. Expires: Never.