Special event is starting this weekend - a temporary locations will appear on the map:

Iroquois War Camp - on Eldorado, New World, Die Eroberung Amerikas, West servers.
Gisors Castle - on all other servers.

These locations will be available only for 96 hours.
Gather your heroes, strengthen your army - enemy is at hand!
Hurry up, because in these locations you can find more valuable artifacts!