Queen Statue

The Queen Statue is one of 42 statues introduced in the 1.1 update. It can be found randomly in underground caverns, and may be harvested with a hammer. When activated, it teleports a random female NPC to the statue's location.

You could use a King and Queen Statue to teleport all your NPCs to an underground safehouse, when there is a Blood Moon or a Goblin Invasion, to keep them safe.

You must have rescued the female NPC or have her living in one of your houses in order for it to be summoned. You cannot summon dead NPCs.