Xenia is an ancient Greek concept of hospitality. It is almost always translated as 'guest-friendship' or 'ritualized friendship'. It is an institutionalized relationship rooted in generosity, gift exchange, and reciprocity. Historically, hospitality towards foreigners and guests was understood as a moral obligation. Hospitality towards foreign Hellenes honored Zeus Xenios, patrons of foreigners.
Jupiter and Mercurius in the House of Philemon and Baucis (1630–33) by the workshop of Rubens: Zeus and Hermes, testing a village's practice of hospitality, were received only by Baucis and Philemon, who were rewarded while their neighbors were punished.
Abraham and the Three Angels (Byzantine mosaic, Monreale)
Hospitality is the relationship of a host towards a guest, wherein the host receives the guest with some amount of goodwill and welcome. This includes the reception and entertainment of guests, visitors, or strangers. Louis, chevalier de Jaucourt describes hospitality in the Encyclopédie as the virtue of a great soul that cares for the whole universe through the ties of humanity. Hospitality is also the way people treat others, for example in the service of welcoming and receiving guests in hotels. Hospitality plays a role in augmenting or decreasing the volume of sales of an organization.
Bringing in the boar's head. In heraldry, the boar's head was sometimes used as symbol of hospitality, often seen as representing the host's willingness to feed guests well. It is likewise the symbol of a number of inns and taverns.
Trestles in the medieval House of Stratford coat of arms: The trestle (also tressle, tressel and threstle) in heraldry is also used to mean hospitality, as historically the trestle was a tripod used both as a stool and a table support at banquets.
Mosaic at San Vitale, Ravenna, Abraham and the angels, pre-547
Interior of the Moro Sky Bar on the 25th and topmost floor of Sokos Hotel Torni in the city center of Tampere, Finland.