Imperial Palace

Imperial Palace is one of the buildings/upgrades in the Castle needed for building Taverns, Temples, Cultural Institute and Alliance Chamber. It is describe by the game as the "political and cultural center that provides a balance of power between Holy, Deity, Devil and Shadow".

The next three improvements all seem to have the same level requirements. They each take 20 people for each level.

Level 1 - needs Castle level 1, 500G , 500 Sandstone , 20 Minutes

(Creation of Alliance Chamber and Cultural Institute)

Level 2 - needs Castle level 2, 1000G , 1000Sandstone , 38Minutes

(Creation of Temples and Taverns)

Level 3 - needs Castle leve 3, 2000G , 2000Sandstone , 1Hour

(Temples up to level 14, tavern level 3)

Level 4 - needs Castle level 4, 4000G , 4000Sandstone , 2Hours

(Temples up to level 19, tavern level 4)

Level 5 - needs Castle Level 5, 8000G , 8000Sandstone , 4Hours 20Minutes

(Temples up to level 24, tavern level 5)