Between the two World Wars in Italy there were numerous architectural vulgarisations of the metaphysical poetics of the "Piazze d'Italia", whose timeless atmosphere seemed to be congenial to the propaganda needs of the time. Squares of metaphysical flavor were built in the historical centers, as in Brescia or Varese, or in newly founded cities, such as those of the Agro Pontino (Sabaudia, Aprilia), to culminate in the spectacular unfinished E42 in Rome.