Two decades have been necessary to complete the great center called to collect the treasures of the Spanish crown. The project was already considered during the Second Republic, but it did not start to take shape until the change of century with a controversial call for ideas. Over these years, the vast construction works and the organization of the royal collections have had to adapt to the already slow ceremonial pace of the Administration, delayed on top of it all by a tough recession, a pandemic, and multiple political ups and downs. A witness of this hectic process from the beginning, Arquitectura Viva now celebrates the inauguration and wraps up the story. The dossier in the issue presents five public buildings in Mexico.