one of the main tourist attractions. Other main attractions are the Roman bridge of Riu Mannu and the Basilica of Saint Gavinus. Due to the decline of the industrial sector, the tourist sector has started to become the leading sector of the local economy (despite the local industrial zone, that importance for the city remains high). Industry Chemical industries support the modern economy of Porto Torres. Fiume Santo, a 1,040 MW power station owned by E.ON, is west from the city, in the municipality of Sassari. Plans related to industrial conversion are in progress in Porto Torres, where seven research centers are developing the transformation from traditional fossil fuel related industry to an integrated production chain from vegetable oil using oleaginous seeds to bioplastics. Minor activities Fishing and farming activities are also practiced around the land. Governance Sister cities Culture Festivals At the end of August it took place the festival called "Suoni & Sapori", a festival that put together the tasting of local food and the listening of music composed by local artists. "La giornata dello sport" is an annual local festival that promote the sport activity for both children and adults. The "Festival Internazionale di Musiche Polifoniche Voci d’Europa" organized by the local polyphonic choir is an annual music festival of the town. The "Fisherman's regatta" is a competition where the fishermen try to fishing using only traditional early 20th-century equipment like rowing boats without any use of modern tools like the GPS tracker. Main sights Churches Basilica of St. Gavinus, St. Proto and St. Gianuario (1080) Built using only hardstones like marble, porphyry and granite, is the largest Romanesque church in Sardinia built between 1065 and 1080 above the hill of "Monte Angellu" in one of the historical neighborhood of the town. The basilica was erected in the memory of St. Gavinus, St. Protus and St. Gianuario, beheaded during the 303 a.C under the governance of the emperor Diocletian and Maximian. Instead of the usual western facade and eastern apse, the cathedral sports two apses. The crypt holds several Roman sarcophagi.It was the main cathedral of the Roman Catholic Archdiocese of Sassari until 1441. Church of Beata Vergine della Consolata (1826) Neoclassic church built by the architect Giuseppe Cominotti (the same person who also built the Marquess's palace) in 1826. It was the main church of the historical seaport neighborhood, distinguished from the rural neighborhood of "Monte