OKISZ headquarters, Budapest, 1973, János Mónus

Source of photos, article in Hungarian with more images: https://epiteszforum.hu/betonba-foglalt-alom--az-okisz-szekhaz

Translators usually don't work well with Hungarian language, but you can try to read the article: https://translate.google.com/translate?sl=auto&tl=en&u=https%3A%2F%2Fepiteszforum.hu%2Fbetonba-foglalt-alom--az-okisz-szekhaz