The establishment of the Port Committee in 1911, which controlled the works of construction and maintenance of the port, and the Piraeus Port Authority in 1930, which made a more efficient job of managing a port slowly increasing in traffic, played a catalytic role in the city's development. The town flourished and neo-classical buildings were erected; one of them, which continues to ornament the present town, is the Piraeus Municipal Theatre, an excellent example of the area's once wider neoclassical architecture. After the decisive period for Greece of 1912–1922, Piraeus experienced a major demographic explosion, with its population almost doubling to reach 251,659 in 1928 from 133,482 in 1920, an increase owed to the arrival of Greek refugees from Asia Minor after the 1919–1922 Greco-Turkish War and the subsequent population exchange between Greece and Turkey. Although there was an increase in the labour force, a variety of social problems also emerged with the concentration of new populations in the suburbs of the city, such as Nikaia, Keratsini, Drapetsona and Korydallos.