Mexico City’s Palacio de Correos is – as its name suggests – a postal palace. Built at the very beginning of the 20th century, its design and construction was the most modern of the time, including an eclectic style that mixes several different traditions into a very complex – and very grand – design. The building has a steel frame and a foundation built on an enormous grid of steel beams, which has allowed it to withstand a number of earthquakes. Built with a very light-colored, almost translucent variety of a stone called “chiluca,” the exterior is covered in decorative details such as iron dragon light fixtures and intricately carved stone around both the windows and the line of the roof. A perfect example of the building’s complicated design is the fact that each of the building’s four floors has windows in a different architectural style. Yet the palace’s unity is maintained through the clever repetition of arches. The main entrance has a large ironwork canopy which is typical of the Art Nouveau that was fashionable in the early 20th century. Inside, the marble floors and shelves combine with bronze and iron window frames manufactured in Florence. The main stairway features two separate ramps that come together to form a landing, then seem to cross on the second landing above before moving off, each in their own direction. Rather an apt metaphor for the mail, don’t you think? Long may it live.