Xorren

I used to play Rangarok Online, and anyone who has done the War of Emperium will know what I'm talking about. About once a week or so there would be a war where guilds would try to take castles by getting to the center of the castle, killing everyone in their way, and then destroying the crystal at the center. They would then own the castle and have to defend it against other guilds.

Are there any recent MMOs that have a mass PvP event like this (doesn't have to be the same type of event, just that there is a regular PvP event such as this)?