thumb|Remains of the Casa Denegrida in the Museo Nacional de las Culturas at the time of its excavation His residence had many rooms for various purposes. Aside from his room, at the central part of the upper floor, there were two rooms beside it which were known as coacalli (guest house). One of these rooms was built for the lords of Tlacopan and Texcoco, the other two members of the Triple Alliance, who came to visit. The other room was for the lords of Colhuacan, Tenayohcan (today known as Tenayuca) and Chicuhnautlan (today, ). The exact reason why this room had this purpose remains uncertain, though a few records like Codex Mendoza say the reason was that these lords were personal friends of Moctezuma. There was also another room which became known as (Spanish: Moctezuma's Black House), a room with no windows and fully painted black which was used by Moctezuma to meditate. Remains of this room have been found in recent years in modern Mexico City. The upper floor had a large courtyard which was likely used as a cuicacalli, for public shows during religious rituals. The bottom floor had two rooms which were used by the government. One of them was used for Moctezuma's advisors and judges who dealt with the situations of the commoners (likely the Tlacxitlan). The other room was for the war council (likely the Tequihuacalli), where high-ranking warriors planned and commanded their battles.
thumb|Remains of the Casa Denegrida in the Museo Nacional de las Culturas at the time of its excavation His residence had many rooms for various purposes. Aside from his room, at the central part of the upper floor, there were two rooms beside it which were known as coacalli (guest house). One of these rooms was built for the lords of Tlacopan and Texcoco, the other two members of the Triple Alliance, who came to visit. The other room was for the lords of Colhuacan Tenayohcan (today known as Tenayuca) and Chicuhnautlan (today, ). The exact reason why this room had this purpose remains uncertain, though a few records like Codex Mendoza say the reason was that these lords were personal friends of Moctezuma. There was also another room which became known as (Spanish: Moctezuma's Black House), a room with no windows and fully painted black which was used by Moctezuma to meditate. Remains of this room have been found in recent years in modern Mexico City. The upper floor had a large courtyard which was likely used as a cuicacalli, for public shows during religious rituals. The bottom floor had two rooms which were used by the government. One of them was used for Moctezuma's advisors and judges who dealt with the situations of the commoners (likely the Tlacxitlan). The other room was for the war council (likely the Tequihuacalli), where high-ranking warriors planned and commanded their battles.