Runes of Magic has announced a new Guild Castle System. The most recent article posted at RunesofMagic.com also offers background information concerning the building process, material requirements and information about the advantages of building a castle. To read more about castles visit or checkout the new Guild Castle Page at Runes of Magic's official website.
Here's the official news notice on the new Guild Castles:

As a guild member you are part of a bigger fellowship, which experiences a lot of adventures together. The planning of upcoming events and exchanging of tales from the good ole' days, happens on a nearly daily base. To further improve the strength of the group, we have created a special sub page for guild castles.

On this page you can get a first glance on how a guild castle can look like, you also receive background information concerning the building process, material requirements and information about the advantages of building such a castle.

Besides having a place for guild meetings and additional storage room for many items, a guild castle is also a symbol of prestige: you can even build a throne or invite visitors. In exchange for resources, you can also upgrade the castle with gates, which can be opened and closed, or you can install teleporters back to the world of Taborea in certain places of the castle.

Finally you can find additional information about the newly added technology tree buildings, which can be built in exchange for resources. These buildings provide your guild with special bonus effects, e.g. if you spend time studying in the library you will benefit from a partial reduction of XP debt. Stables on the other side grant a temporary bonus on riding speed.

This information and more about the guild castle system can be found on our site for guild castles.