The eleventh house is the eleventh of the twelve houses of the horoscope. It governs friends, groups and communities, alliances, and hopes and wishes, the wider circle beyond the family and the aspirations a person holds for the future. It is a succedent house, of moderate strength, following the angular tenth. The older tradition regarded it as one of the more fortunate houses, well disposed toward planets placed there and connected with good fortune and the fulfilment of hopes. These are the interpretive conventions of the astrological tradition for this division of the chart, in which the eleventh house describes the company a person keeps and the goals they reach toward; it stands opposite the fifth house of personal creativity and pleasure across the wheel, the axis of the individual's own delight against the wider group and its shared aims.
The Hellenistic Greek name for the eleventh house, Agathos Daimon, the Good Spirit, and the tradition's assignment of Jupiter's joy to this place mark it, alongside the fifth house of Agathe Tyche, as one of the two most consistently fortunate divisions of the twelve, a scheme already traditional when Vettius Valens was writing around 175 CE and set out systematically by Paulus Alexandrinus in 378. Jupiter's joy here, the great benefic finding its particular ease in the house of friends and hopes, reinforces a reading of the eleventh as a place of genuine good fortune received through others rather than earned alone, wishes granted through alliance and community, a benefic weight the house carries in the oldest layer of the tradition before it was ever described in the more individualist language of personal goals and aspirations.
Sources A History of Western AstrologyNicholas Campion with Introduction to Astrology (Eisagogika)Paulus Alexandrinus