the 15th century, with Cosimo Tura, Francesco Cossa and Ercole dei Roberti. Noted masters of the 16th-century School of Ferrara include Lorenzo Costa and Dosso Dossi, the most eminent of all, Girolamo da Carpi and Benvenuto Tisi (il Garofalo). The district is also home to University of Ferrara Botanic Garden. Parks and gardens The town is still almost totally encircled by of ancient brick walls, mostly built between 1492 and 1520. Today the walls, after a careful restoration, make up a large urban park around the town and are a popular destination for joggers and cyclists. Demographics In 2007, there were 135,369 people residing in Ferrara, of whom 46.8% were male and 53.2% were female. Minors (children ages 18 and younger) totalled 12.28% of the population compared to pensioners who number 26.41%. This compares with the Italian average of 18.06% (minors) and 19.94% (pensioners). The average age of Ferrara residents is 49 compared to the Italian average of 42. In the five years between 2002 and 2007, the population of Ferrara grew by 2.28%, while Italy as a whole grew by 3.85%. The current birth rate of Ferrara is 7.02 births per 1,000 inhabitants compared to the Italian average of 9.45 births. Ferrara is known as being the oldest city with a population over 100,000, as well the city with lowest birth rate. , 95.59% of the population was Italian. The largest immigrant group was other European nations with Ukraine and Albania: 2.59% followed by North Africa: 0.51%, and East Asia: 0.39%. The city is predominantly Roman Catholic, with small Orthodox Christian adherents. The historical Jewish community is still surviving. Culture Jewish community The Jewish community of Ferrara is the only one in Emilia Romagna with a continuous presence from the Middle Ages to the present day. It played an important role when Ferrara enjoyed its greatest splendor in the 15th and 16th century, with the duke Ercole I d'Este. The situation of the Jews deteriorated in 1598, when the Este dynasty moved to Modena and the city came under papal control. The Jewish settlement, located in three streets forming a triangle near the cathedral, became a ghetto in 1627. Apart from a few years under Napoleon and during the 1848 revolution, the ghetto lasted until Italian unification in 1859. In 1799, the Jewish community saved the city from sacking by troops of the Holy Roman Empire. During the spring