Nowhere else in the world do two opposing visions of the Cold War coexist so clearly as in Berlin. Just a few kilometers apart lie the Hansaviertel and the Karl-Marx-Allee, two neighborhoods built almost at the same time but under very different political systems.

I studied in a period when architecture was often identified with famous architects and their iconic works. On our first trips abroad with the university, we searched for such buildings: Libeskind, Koolhaas, Piano.

Living in Berlin, however, made me realize that such works have little meaning in the daily life of a city. By turning my focus to neighborhoods, atmosphere, and historical heritage, I came to see architecture in dialogue with art, history, politics, and society. From this perspective, Berlin—and Athens—have much to offer.

The Hansaviertel in West Berlin was almost completely destroyed by bombing in World War II. It was rebuilt from scratch and turned into a modernist laboratory during the Interbau 1957 exhibition.

Leading architects such as Walter Gropius, Alvar Aalto, Oscar Niemeyer, Arne Jacobsen, and Egon Eiermann participated. The urban model was based on the free placement of buildings in space, which symbolically referred to the individual and personal freedom.

At the center stood the new Academy of Arts, designed by Werner Düttmann, as a hub of public life—a modern „agora“ inspired by the ancient Greek tradition.

On the eastern side, the Karl-Marx-Allee began construction in 1952 under the name Stalinallee. It was designed by architects such as Hermann Henselmann and Richard Paulick, a Bauhaus graduate and close collaborator of Walter Gropius.

With a length of about 2 kilometers and a width of 90 meters, framed by monumental housing and cultural buildings, the boulevard leading to Alexanderplatz was not only about providing housing for the working class, but about shaping a collective space for mass events—parades, festivals, public gatherings—where the urban space reinforced collective experience and identity.

Since reunification, both neighborhoods have lost the central role once envisioned for them. Apart from the active presence of the Academy of Arts and the appreciation of architects and historians, they are often seen as socially neglected—unlike districts such as Mitte, Kreuzberg, or Charlottenburg.

The question is whether the dual urban vision of the Cold War failed, or whether it was simply overtaken by historical, social, and political change.

Even so, their value remains unquestionable. Berlin is preparing a joint dossier for their inclusion on the UNESCO World Heritage List, as a globally unique Cold War urban ensemble.

The challenge, however, is not only recognition: it is how these „inhabited ruins“ of another era can once again become living urban centers. And this challenge does not concern only the Hansaviertel and Karl-Marx-Allee, but many similar neighborhoods across Europe that are called to transform their difficult heritage into an active part of today’s city.