According to the
Istituto Nazionale di Statistica (the Italian Statistical Institute), Castel del Monte's resident population on December 31, 2021 was just 456 well below the town's population in earlier centuries. Until recent times, Castel del Monte's economic wellbeing has been tied to sheep farming. Between the 12th century and 16th century, the area was one of the most prolific wool producers in Europe. This prosperity continued until the end of the
Transhumance, an annual sheep drive south to Apulia, which ceased in the 1850s. Though Castel del Monte continued to produce wool,
pecorino cheese and lamb, the economy never recovered to its pre-1850s level and the town's population steadily declined. This population decline accelerated in the second half of the 20th century when significant numbers of Castel del Monte's residents migrated to
Wallonia, many to work in its coal mines. Others migrated to
France,
Switzerland, the
United Kingdom, and the
United States. In recent years, former residents who emigrated to French-speaking countries and their children have been returning to Castel del Monte with more frequency for vacations and, in some cases, to retire. Tourism is central to Castel del Monte's economic hopes. The absence of economic development in the 20th century meant there was little new construction in Castel del Monte within the past 100 years. As a result, most structures in Castel del Monte are several centuries old, and many are little changed from the
Middle Ages or
Renaissance. The creation of
Parco Nazionale del Gran Sasso e Monti della Laga in 1993, which Castel del Monte lies entirely within, assures that the land surrounding the town will remain forever wild, thus preserving Castel del Monte in a near pristine state. Castel del Monte's biggest tourist event is
La Notte delle Streghe or
The Night of the Witches, an annual event for which the town is well known. Held in mid-August, thousands visit the town for the late-night spectacle where the entire historic district serves as a stage for residents who play the roles of townspeople and witches in a folk drama in the local dialect known as "Castellano". In 2006, Castel del Monte was named one of the "borghi più belli d'Italia", the most beautiful villages of Italy. In return for this honor, the town agreed to promote historic preservation and environmental protection. The town has also been recognized by the
Slow Food movement for its sustainable agriculture, in particular its
canestrato cheese. == Popular culture ==