The typical Roman street plan with streets at right angles can still be seen in the modern city. The capital of the Duchy of Savoy since 16th century, the Kingdom of Sardinia and then in 1861 Turin became the capital of the newly proclaimed United Italy. In 1865 the capital was moved to Florence and in 1871 to Rome.
In the 2001 census, Turin was the fourth largest city in Italy, with a large proportion of people with southern-Italian background as a consequence of the mass immigration of the second half of the twentieth century, and a significant presence of immigrants from Africa and Asia.