The ideas competition was won with the motto “Under the Volcano”, a proposal materialized in a great element around which everything revolves. The conch was the calling tool of Mayan cultures. Hence, using this symbol, that central element is to be spiral-shaped (as a seashell), as a response to a reunion and dialogue programme, around which the rest of elements are organized. With a capacity for 184 deputies, 40 diplomats, visitors and press, the chamber of deputies is embraced and accompanied by an administrative building and offices, connected by their main seating floor. It expands towards a plaza that could host institutional events.