Can a player/castle be completely destroyed in the game?

Castles have a durability level. When they are attacked enough to reduce the durability to zero then the castle will be randomly teleported to a new location in the world map. The durability will slowly recover (although they player can spend gems to recover it faster). It is not destroyed, but it will have lost any resources that were raided and troops will be wounded or dead. It can be recovered easily though.

If a person stops playing and doesn't log into the game them their castle will eventually be removed from the map.