Festivities of Ateca Activity · Ateca, Comunidad de Calatayud, Zaragoza Image of Ateca, not of the place itself. The patronal festivities of Ateca are celebrated in the town where José María Hueso founded an artisan chocolate factory in 1862, the origin of the Huesitos chocolate bar created in 1975, which the local plant still produces today. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in Ateca