Fine Arts Palace
From the Super Mario Wiki
The Fine Arts Palace (in Spanish: Palacio de Bellas Artes) is an art museum in Mexico City, including drawings by Mexican artists such as Rufino Tamayo and Diego Rivera. Luigi once visited the Palace during the events of Mario is Missing!, after the Fine Arts catalog, a directory of artworks found in the Palace, had been stolen by Koopa Troopas. Upon returning the catalog to the museum Luigi was rewarded 900 dollars.
Pamphlet information from Mario is Missing!