As mentioned above, the economy of the region is based on a widespread mosaic of small and medium-size enterprises; of particular importance are the four industrial districts where a multitude of such highly specialised enterprises are concentrated. These districts are centred around the towns of Manzano, San Daniele del Friuli (cured ham), Maniago (knives) and Brugnera (furniture). A number of large enterprises are also present in the region in both the industry and services sector. Some of these companies are world-leaders in their relevant sectors; such are Fincantieri (headquarters in Trieste with shipyards in Monfalcone) for the construction of the world's largest cruise ships, Zanussi-Electrolux (Pordenone) in the production of electrical appliances, Danieli, Eurotech, Illy, Rizzani de Eccher, Solari di Udine, TBS Group, Banca Generali, Genertellife, Italia Marittima, Telit, Wärtsilä, Allianz Italia and Assicurazioni Generali in Trieste, a leading insurance company in the world.