[1][2] The floor was made of large irregular black basalt slabs.
[3][4] As soon as 1535, the Mexican Mint (Casa de Moneda de América Latina) was built on top of the remains of the Casa Denegrida.
In 1850, minting operations stopped and the building became the Museo Nacional de las Culturas.
[5] In November 2008, a group of archaeologists led by Elsa Hernández Pons working at 13 Moneda St. uncovered pieces of a wall and a basalt floor.
The archaeologists believed it was the Casa Denegrida described by Spanish conquerors where Moctezuma II would meditate and practice shamanic rituals.