Premium
In the menu `Premium´ you got the possibility to buy small ingame advantages. To enable those advantages you need "gold", which can not be found ingame, you can only buy it.
You got 5 different advisors that you can enable, Each of them offers another advantage. You can enable all of them or only add the one(s) you need the most. With gold you can also half your building time, this will cost 20 gold per time.
"The gold isn't bound for use for just 1 world, you buy premium for your account. This means that you can use your gold on all worlds you play."
Administrator
The Administrator supports you during the development and organisation of a huge empire. You can place up to seven construction orders and he will prepare many detailed overviews for you. You also receive a customisable "quickbar".
Merchant
The merchant increases your resource production by 30%, He also allows favorable trade with the farm villages.
High Priestess
The High priestess has an especially good relationship with the gods, she increases your favor production by 50% and let your mythical creatures fight 20% stronger.
Commander
The commander enjoys the highest regard among your troops, He is able to increase your troop's motivation even further. The land units fight 20% more strongly.
Captain
The Captain is an expierenced seafarer who has already defeated many enemy fleet.
His expierence is a valueble enhancement of your naval battle force, he will make naval fleet fight 20% more strongly.
Cut building time in half
Next to your advisors you also got the option to cut building time in half, this will cost 20 gold per time you use it.
The agora
In the Agora (if your academy is level 30) you can use the "Olympic games" premium, this will cost 50 gold and will add culture points (needed to take over/found towns).