40 years ago, regular broadcasting of Slovak Radio began in the upside-down pyramid at Mýtna Street 1 in Bratislava. On this occasion, we bring you two stories with the same topic - architecture. Radio building has its brother in Arizona, Tempe. Zuzana Botíková had a closer look at the fascinating resemblance of those two buildings. And we also look back at the interview about "rough poetry architect" Hans Broos.