Broad streets and numerous palaces (most notably, the Estense castle) originate mostly from 14th and 15th centuries. For its beauty and cultural importance, Ferrara was inscribed into UNESCO Wold Heritage List The town is still surrounded by more than 9 kilometres (6 miles) of ancient walls, mainly built in the 15th and 16th centuries. Together with those of Lucca, they are the best preserved Renaissance walls in Italy. Most palaces of the town also belong to this period. The historical Jewish community is still surviving in town.