To quote the announcement, "You can get the Olympic Treasury building (Level 1) and some upgrade kits from the quest line, as well as the Touchdown Reward. To upgrade the Olympic Treasury you will need the Olympic Treasury Upgrade Kit (
), and the higher its level, the more and better bonuses it gets. Once you upgrade the Olympic Treasury to level 10 it will provide you
Defense Boost for your Attacking armies,
Forge Points,
Goods,
Coins and
Supplies."