Zeus of the Strangers/Guests

Zeus Xenios was one of the many cult titles under which Zeus was worshipped, each epithet making a distinct sphere of his authority. As Xenios, he stood as the divine guarantor of the guest-host relationship; he watched over travellers far from home, obligated hosts to offer hospitality, and punished those who violated it, on either side.

This role gave xenia it's religious force. Because a stranger at the door might be a god in disguise - a motif that reoccurs across Greek myth, from Baucis and Philemon unknowingly hosting Zeus and Hermes, to Odysseus testing the hospitality of those he meets on his journey home - refusing or abusing hospitality was treated as a direct offence against Zeus himself, carrying the risk of divine retribution. The Trojan war itself was framed by Homer as originating in a breach of this sacred trust, when Paris betrayed Menelaos's hospitality. 

Zeus Xenios was typically honoured with offerings at the hearth or table rather than through a dedicated temple cult: his presence was invoked more in the act of hospitality itself than in formal ritual. For modern practitioners, he represents the intersection of piety and everyday ethics - the idea that how one treats a stranger is itself a form of devotion.