Halcyon's Mansion is the home of Greek demigod Halcyon Green and was seen in The Demigod Diaries.


The door is heavily enchanted and the drapes are deadly sludge that creeps up anything that touches it.

The Heroes of Olympus

The Demigod Diaries

The Diary of Luke Castellan

Thalia Grace and Luke Castellan discover the mansion while being lead there by Amaltheia.


Halcyon Green, who owned the house before it was destroyed.

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