Construct alliance buildings faster

How come it takes so long to construct our Alliance Buildings?

The speed with which alliance buildings are constructed is influenced by the amount of troops and the average tier of troops that are used to construct. There are also several alliance research projects that influence the alliance building construction speed. The amount of troops that can be used to construct a building are influenced by the Hall of War level of the first player to construct the building. Make sure this is a player with high level Hall of War. If there are enough troops available, you can ask people to only use higher tier troops to construct.