The first two rooms at the right side of the staircase are reserved for the Spanish banners, flags and uniforms. In the Sala de Uniformes Españoles (Room of the Spanish Uniforms) some uniforms of different Spanish officers along with their sabers, walking sticks, medallions, hats etc. are exhibited in showcases. The uniform of Ramón Herrera Sancibrián, colonel of the volunteer corps, that put pressure on the governor to impose the death penalty of the eight medical students that would be shot in 1871, is one of these uniforms. Additionally, the uniform of the Spanish Admiral Juan de la Cruz Garcia Carbonell, Commandant of the Apostadero (naval station) of Havana, his walking stick made of wood and tortoise shell, his saber and his bicorn (a two-cornered cocked hat) from the second half of the 19th century, are exhibited in the same room 

In the Sala de Banderas Españoles (Room of the Spanish Banners and Flags) several pennants and banners of the colonial time can be seen. The lances with flags that were used by the Spanish against the machetes of the Cuban rebels to prevent their passage, a shield representing the Bourbon dynasty and three Spanish flags used in combat, are the main pieces of the exhibition room.

The room at the corner, called as the Despacho Publico (Public Dispatch), is remembered as the site where some distinguished personalities took office, like the German scholar Alejandro de Humboldt and the General of the Liberatodar Army Antonio Maceo Grajeles. The first telegraphic equipment can be seen in a display case. There are also some documents, issued by the Spanish Crown and the captain generals of the island, among which the government order of Valeriano Weyler about the concentration of the native Cubans in camps in 1896, stands out.

In the room next to the Sala de Uniformes Españoles, named the Salón Verde (Green Hall; also known as the Salón Dorado (Golden Hall)), was used by the governor to receive his guests. The visitor will see the wooden sitting room furniture, consisting of four baroque style armchairs, on a checkered marble floor. The blue porcelain vase on the round marble coffee table is another nice detail.

Next to the Salón Verde you will arrive in the chapel (La Capilla).

The next room, the Salón Blanco (White Hall), differs from the other rooms by the elegant wall sconces in the shape of candelabrum. The floor is laid down with light grey marble in harmony with the pastel color of the walls. It is decorated with Louis XV and Louis XVI furniture. Two beautiful 18th century Meissen porcelain vases in the room are among the most valuable pieces of the museum. It was used as the anteroom of the Salón de los Espejos to receive guests on holidays, selected among the Spanish and Creole elites, and as the space for musical auditions. One string instrument is exhibited on an antique piano at one corner of the room.

The Salón de los Espejos (Hall of Mirrors) can be accessed through the Salón Blanco (White Hall). Exceptional huge Venetian mirrors at the walls and the ostentatious crystal chandeliers on the ceiling are the main characteristics of this room. Antique table clock watches, candelabrums and porcelain Chinese vases are adorning hall. In contrast to the former rooms decorated in pastel colors, the walls of the Salón de los Espejos are painted in red.

Illustrious people that visited Cuba in the 19th century, were received by the governor in this hall that was also known as Salón del Besamanos. Besamanos is a public act in which the hand of the king or queen is kissed. It was a space where the Havana society paid homage to the governor. It was also a place where some important events took place, such as the transfer of powers from the Spanish administration to the US in 1899 (the end of the Spanish rule), the announcement of the neo-colonial Republic in 1902 and the funereal ceremonies of Máximo Gómez and Salvador Cisneros Betancourt.

The Salón de los Espejos opens to the Salón del Trono (Throne Hall) that was prepared for the visit of the King of Spain, but such an event never happened, neither during the colonial time nor later. In 1999 the Spanish King Juan Carlos I visited Cuba on the occasion of the VII. Ibero-American Summit. It was the first time that a Spanish sovereign arrived officially in Cuba. When the Spanish King Juan Carlos I toured the Palacio de los Capitanes Generales, he declined to take a seat on the throne, dating from 1791. Although a Spanish monarch never sat in this room, the flag of Spain stands here since March 2018.

The room with dark-red, satin-lined walls, was built in the style of the Palacio de Oriente in Madrid. Magnificent candelabrums with decorative pedestals are placed in front of the throne. The portrait behind the throne belongs to the Spanish Queen Isabel II, painted by the Spanish painter Federico de Madrazo y Kuntz, and the portrait at the wall belongs to the Spanish King Fernando (Ferdinand) IIV. Some porcelain that belonged to the Russian Tsarina Catherina the Great (or Catherina II) is exhibited in the room. The adjacent room, the Despacho Privado (Private Office) was also prepared for the Spanish King.

In the Sala Ambientada (Living Room) the most striking feature is the frescoes at the walls, surrounding the room. Among the most important pieces of this private part are the medallion furniture from the Elizabethan period, designed by John Henry Belter, and the two French vases made with the cloisonné technique, as well as two landscape oil paintings, one by the Spanish painter José María Romero and the other by Esteban Chartrand, the Cuban landscape painter. 

The Sala Dormiterio (Bedroom) was used as the bedroom by the wife of the general captain. In 1893, Infanta Eulalia de Borbón visited Havana, and during her seven-day stay she occupied this room. The Havana aristocracy entertained her with parties and gifts, some exhibited even in this room. 

In the Sala de Baño (Bathroom) the Italian Carrera marble bathtubs in the form of nautilus shell or gondola are real treasures. The room was decorated similar to the other rooms. It can be accessed directly from the Sala del Café and there is not any door in between. 

The Sala del Café (Coffee Room) is one of the vivid places of the palace. A nice set of coffee room, consisting of armchairs with lattice back, stands out. The wall reliefs and the works of foreign painters of the 19th century, such as Victor Patricio de Landaluze, Francis Mejasky, Valentin Sanz Carta and Henry Cleenewerck are adorning the walls. A backgammon box is another interesting detail.

The Trinchante (Carver Room) is a small room that contains luxurious tableware and the portraits of the Ximeno family, made by the American painter Elias Metcalf.

Several dinner tables with different motives, but in majority the same size, are enriching the walls of the Antesala Comedor (Anteroom of the Dining Room). A wooden table is placed in the middle of the room with ceramic candelabrums on it.

The Comedor (Dining Room) is a rather impressive space. It was the place where large banquets were given to celebrate some political events. It witnessed also many receptions and parties sponsored by the general captain himself. The walls are decorated with different dinner tables, like in the anteroom, that belonged to more than one hundred Cuban families. Interesting tapestries from the 17th and 18th century, are adorning the walls. A long-oval dinner table, made of wood, stands on a well-preserved carpet that covers half of the hall. The silver copper alloy trays give an idea about the magnitude of the celebrations of the time.

The Art Nouveau furniture from the late 19th century, stands out in the second Sala Ambientada (Living Room II). The miniature furniture, used as toys, bring a smile to the visitor’s lips.

The Sala de Intervención Norteamericana (Room of the North American Intervention) was used by John Brooke, the American military Governor appointed for Cuba, after the Spanish authorities handed over the power to him in 1899.