Building Lines
Each line upgrades as the city's culture level rises — names link to the full details below.
| Line |  Weak |  Developing |  Strong |  Legendary |
|---|---|---|---|---|
| Barracks |  Barracks +20%  +20% Adjacent Garrison +10 XP for Melee Units | — | — | — |
| Baths | — |  Heated Baths 4  +10%  | ||
| Courthouse | — |  Courthouse +20%  |  Ministry +30% |  Palace +40% -10%  |
| Garrison |  Garrison 0.5  |  Stronghold 0.5 |  Citadel 0.5 -10% | — |
| Hamlet |  Hamlet 10  | — | — | — |
| Library | — |  Library +10%  |  Academy +20% |  University +10% +30% |
| Market |  Market +30% |  Grocer +40% |  Fair +50% | — |
| Odeon |  Odeon 3  |  Theater 4 1 |  Amphitheater 5 2 | — |
| Pillar Edicts |  Pillar Edict 2 2  | — | — | — |
| Range |  Range +20% +20% Adjacent Garrison +10 XP for Ranged Units | — | — | — |
| Improvement | Tech | Other Prereq | Cost | Build | Upkeep | Specialist Slot | Effects | Terrain | Restrictions |
|---|---|---|---|---|---|---|---|---|---|
| Citadel Garrison | — | Strong | 100  | 6 turns | 4 /turn | — | 0.5 -10% | Habitable | Urban tile only Max 1/City |
| Garrison Garrison | — | — | 60 | 4 turns | 2 /turn | — | 0.5 | Habitable | Urban tile only Max 1/City |
| Stronghold Garrison | — | Developing | 80 | 5 turns | 3 /turn | — | 0.5 | Habitable | Urban tile only Max 1/City |
| Pillar Edict Pillar_Edicts | — | — | 10 | 1 turn | — | — | 2 2 | Habitable | Urban tile only Max 1/City |
| Amphitheater Odeon |  Drama | Strong | 80 | 6 turns | 4 /turn |  Elder Poet | 5 2 | Habitable | Urban tile only Max 1/City |
| Odeon Odeon | Drama | — | 40 | 4 turns | 2 /turn | Apprentice Poet | 3 | Habitable | Urban tile only Max 1/City |
| Theater Odeon | Drama | Developing | 60 | 5 turns | 3 /turn | Master Poet | 4 1 | Habitable | Urban tile only Max 1/City |
| Hamlet Hamlet |  Polis | — | 20 | 4 turns | 1  /turn | — | 10 | Habitable | Urban tile only |
| Barracks Barracks |  Military Drill | — | 40 | 4 turns | 2  /turn |  Apprentice Officer | +20% +20% Adjacent Garrison +10 XP for Melee Units | Habitable | Urban tile only Max 2/City |
| Fair Market |  Coinage | Strong | 100  | 6 turns | — |  Elder Shopkeeper | +50% | Habitable | Urban tile only Max 1/City |
| Grocer Market | Coinage | Developing | 80 | 5 turns | — | Master Shopkeeper | +40% | Habitable | Urban tile only Max 1/City |
| Market Market | Coinage | Weak | 60 | 4 turns | — | Apprentice Shopkeeper | +30% | Habitable | Urban tile only Max 1/City |
| Courthouse Courthouse |  Citizenship | Developing | 80 | 4 turns | 2 /turn |  Apprentice Scribe | +20% | Habitable | Urban tile only Max 1/City |
| Ministry Courthouse | Citizenship | Strong | 100 | 5 turns | 3 /turn | Master Scribe | +30% | Habitable | Urban tile only Max 1/City |
| Palace Courthouse | Citizenship | Legendary | 120 | 6 turns | 4 /turn | Elder Scribe | +40% -10% | Habitable | Urban tile only Max 1/City |
| Range Range |  Composite Bow | — | 40 | 4 turns | 2 /turn | Apprentice Officer | +20% +20% Adjacent Garrison +10 XP for Ranged Units | Habitable | Urban tile only Max 2/City |
| Academy Library |  Scholarship | Strong | 100 | 5 turns | 3 /turn |  Master Philosopher | +20% | Habitable | Urban tile only Max 1/City |
| Library Library | Scholarship | Developing | 80 | 4 turns | 2 /turn | Apprentice Philosopher | +10% | Habitable | Urban tile only Max 1/City |
| University Library | Scholarship | Legendary | 120 | 6 turns | 4 /turn | Elder Philosopher | +10% +30% | Habitable | Urban tile only Max 1/City |
 Cold Baths Baths |  Architecture | Developing | 40 | 4 turns | 2 /turn |  Apprentice Doctor | 2 | Habitable Fresh | Urban tile only Max 1/City |
| Heated Baths Baths | Architecture | Legendary | 80 | 6 turns | 4 /turn | Elder Doctor | 4 +10% | Habitable Fresh | Urban tile only Max 1/City |
 Warm Baths Baths | Architecture | Strong | 60 | 5 turns | 3 /turn | Master Doctor | 3 | Habitable Fresh | Urban tile only Max 1/City |