Great buildings are legendary buildings you can build in your own city which is implemented in the update of Forge of Empire version of 0.22. Each Age offers 2 Great buildings the players can erect. Each great building has 10 levels. The higher the level, the more powerful the Great building bonus becomes.

The list of Great Buildings

Blueprints

You can acquire the 9 blueprints in the following ways:

1. Purchase any specific blueprint with diamonds in construction screen.
2. Doing positive social interaction. For example, polish and motivate.
3. Plunder buildings after attacking another player, but lower find rate than motivating/polishing. 
4. Helping in construction of another great building of other player by donating forge point, the blueprints will be received at the end construction phase of this building. See here.

The Blueprint will belong to the great building of the age same as the building that player just polished or motivated or plundered.

Construction

To place the great building, you will first have to acquire the 9 separate blueprints and also the required goods of the building's age. However, the placed great building is level 0 and it does not give any bonus yet. See the next section.

Upgrade

The great building on level 0 is just a construction site and it won't build up itself. Players have to use an amount of forge points to upgrade it. Once the building reaches level 1, it is built and start to give out bonuses but still can be upgraded with increasing bonuses to a maximum of level 10.

Details of the cost of forge points on levels can be found in the topic of each building.

Bonuses

The most important function of great building is the powerful bonuses that increase with the building's level. Depending on the building, you might get the following:

• Military boost

Attack and defense bonus for units in attacking army, adds up with every great buildings with same bonus

• Defense boost

Defense bonus for units in defending army, adds up with every great buildings with same bonus

• Coin boost

Raises the production of your houses 90 times a day, adds up with productivity and motivation

• Supply boost

Raises the production of your production buildings 40 times a day, adds up with productivity and motivation

• Good Production

An amount of goods from your current age every 24 hours

• Medal production

An amount of medals every 24 hours

• Research

An amount of forge points every 24 hours

• Coin production

An amount of coins every 24 hours

• Supply production

An amount of supplies every 24 hours

• Population

Permanent population bonus

• Happiness

Permanent happiness bonus

• Quest Boost

Gives you extra rewards on a quest

• Penal Unit

Gives you some free random units, that you can build in your city, to fight with

Details of the bonuses of each great buildings can be found in the topic of them.

Donation

To help construct a great building, simply visit a city in which a Great building construction is present and click on the Great building. You may now donate Forge points, and also view which reward you will receive for your current donations.

When the current construction level is completed, the top five most generous donors will receive some reward which depends on the levels and age of the great buildings.

• Medals (all top five)
• Forge point packages (varies depending on level)
• Blueprint, as following table:

Great Buildings Walkthrough Video