Forlì, Italy offers a unique possibility to view--on a single street--the evolution of Italy's modernist architecture from the 1930s, known here as Rationalism.
Take a walk down Viale della Libertà, from the Forlì train station to the Monument to the Fallen, a few blocks away. Along the boulevard, you will see examples of Italian architecture during the Fascist period, some of the buildings bringing previously unknown conveniences (indoor plumbing!) to the realm of public housing.
The commune of Forlì has taken a leadership role in preserving this architecture, in a project known as ATRIUM (Architecture of Totalitarian Regimes in Urban Management), devoted to preserving the Rationalist movement in Italy, Greece and the Balkan states.
The buildings are surprisingly, well, modern!