The Mausoleum is a limited-time premium building first released during the Treehouse of Horror XXIII Event where it produced fifteen zombies for the Player to squash every eight hours; during the Treehouse of Horror XXIV Event it produced 5 ghosts every 8 hours; and finally during the Treehouse of Horror XXVI Event produced 8 Skeletons every 8 hours. It did not produce special currency during the Treehouse of Horror XXV Event.
It has been re-released for all subsequent Treehouse of Horror events. During XXV it was bundled with the Senile Zombie.