Embassy
All levels: cost, build time and what each level gives »
Embassy level 1 lets you join an alliance; level 3 lets you found one. The leader's Embassy level sets the alliance size: 3 members per level.
Needs Main Building level 1.
The alliance can have 3 members per Embassy level of its leader (at least 3). A leader with Embassy 20 can lead 60 players.
Founding an alliance also costs 280 Gold.
The Palace needs Embassy level 1.
