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docs/monuments/_index.md

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+# Monuments
+
+Large-scale constructions that provide powerful island-wide effects.
+
+## Available Monuments
+
+- [Amphitheatre](./amphitheatre.md) - Unlocked with Patricians, hosts events
+
+## Monument Mechanics
+
+- **Unique:** One per island (reported)
+- **Construction:** Multiple stages, requires expensive materials
+- **Effects:** Large radius bonuses to Population, Happiness, Prestige
+- **Events:** Can host special events consuming goods for city buffs
+
+## Construction Tips
+
+- Start monuments only when economy is stable
+- Plan for expensive materials (marble, glass, iron)
+- Consider the maintenance + diverted materials cost