anyone residing on Piazzo hill (elevated section of the city) as an incentive to the establishment of a place of refuge against the warfare between the Guelphs and Ghibellines of Vercelli: this was the birth of the Borgo del Piazzo, site of the handsome public square, the Piazza Cisterna, and a Palace fronting it, the doors of which have stone capitals and terracotta ornaments. Bishop Uguccione's castle was destroyed in a revolt in 1377 that led to the subjection of Biella, along with its dependent comuni, to the yoke of the House of Savoy. Modern times In the 14th and 15th centuries, the Visconti family competed with Savoy for the possession of the Biella region. The 17th century saw a similar competition between French and Spanish forces, and Biella was actually occupied in 1704; in 1706 Pietro Micca, a Biellese soldier, saved nearby Turin from a siege that would have meant the invasion of Biella by the French as well—but paid for it with his own life. In 1798 Biella was once again occupied by the French, and after the Battle of Marengo, Biella was formally annexed by France. The Congress of Vienna returned it to Savoy. In 1859 Biella was besieged by the Austrians but Garibaldi forced an end to the siege, and the town became part of the province of Novara, losing its status as regional capital that it had received in the 17th century from Charles Emmanuel I of Savoy; it was transferred to the province of Vercelli in 1927. In World War II Biella was the scene of armed resistance. In 1992, the new province of Biella was formed, separating the territory from the north-western sector of the province of Vercelli. Wool industry In 1245 the statutes of Biella were already referring to the wool workers' and weavers' guilds: hardly surprising in view of the region's high mountain pastures and copious water supply needed for washing fleece and powering mills. In the 17th and 18th centuries, as elsewhere in Italy, silk was an important industry, and a silk factory was built in the town in 1695. In 1835, however, the town's textile history came round full circle when the same building was put to use as a wool factory with the introduction of mechanical looms, putting Biella at the forefront of modern improvements in the industry. Around 1999/2000, a progressively worse economic crisis in the wool