Gold mine

The Gold mine produces gold, used to build and upgrade buildings, technologies and your army. It produces 4 gold every 10 seconds at level 1 and upgrades increase gold production by 50% per level. So building more gold mines and upgrading them is very usefull. You may harvest bonus gold from this building, which will occur about every 20 minutes.

For every three Gold mines you will need one Residence of equal or higher level.