A 500-year record of changes and continuities in structures defined as ceremonial has been discovered in the Qhuna phase (5000-4400 B. P.) of Late Preceramic period Asana in the Moquegua drainage of southern Peru. These are the earliest known ceremonial structures in the south-central Andes, and their existence raises new questions about the trajectory of cultural change in the region. In its earliest construction around 4800 B. P., the ceremonial complex appears to be a “dance ground,” similar to the sometimes-enclosed spaces used by ethnographically known mobile foragers for periodic feasts and social exchanges. By 4500 B. P., however, the complex appears to be more formal in its construction, with a clear inside-outside dichotomy of feature placement and presumed activity performance. In this paper, the structural features of the ceremonial complex are described, compared to other, roughly contemporaneous expressions of ceremonial structures in the Andes, and their function interpreted.