The document summarizes the development of Rome as the capital city of Italy from the 19th century onwards. Key events include the construction of the first rail lines in the 1850s-1860s connecting Rome to other cities, which spurred new development. In the 1870s, Rome became the capital after being conquered and its medieval layout was transformed through new districts and infrastructure projects. During the fascist period of Mussolini, large urban planning projects reshaped the city center and new areas like EUR and the Foro Italico sports complex were constructed. After World War 2, Rome expanded further through new suburban districts connected by improved public transport.