The Postal Palace (Palacio Postal) is an architectural gem with Plateresque and Elizabethan styles. It was built by the Italian Adamo Boari and Mexican Gonzalo Garita in 1902, and opened in 1907 under the rule of President Porfirio Díaz, in order to have premises that would meet the needs of the postal service.

The building is full of artwork such as gargoyles, marble ornaments and plaster work. The staircases are made of Mexican marbles and the bronzes were made in the Fonderia Pignone in Florence, Italy. The clock in the main building was imported from Germany by the Dienner Brothers and the La Perla jewelers.

The building continues to serve as a postal service, and has a museum that displays objects and historical documents. On the second floor there is the permanent exhibition of Postal Culture, the interactive room Introduction to Philately. It has a library with 8500 volumes and 240 historical documents dating from 1580 to 1900.