Palacio del Marqués de Casa Riera

Its plant formed a rectangle parallelogram, consisting each of its four facades of three floors that were in all them in the same horizontal plan, serving as entrance to the building a spacious garden, which occupied the site of the old Convento de la Natividad y San José[1][2] [3] A portal with three entries, ornate with pillars, separated this garden from the Calle de Alcalá.

[2] It was built as a dowry for the Duchess of Abrantes, for which circumstance was designated with the name of "la casa de los alfileres" (the house of the pins).

[2] [2][a] In the new building lived the Marquis of Ariza, the Russian ambassador, Prince Tatischef, and the famous provisionist of the French army and great financial Gabriel-Julien Ouvrard, in 1823 and 1824, at which time were held on its halls magnificent soirees and banquets, until it acquired the Catalan Marquis of Riera, who invested large sums in the decoration.

After the Spanish Civil War the site of the palace is occupied by a building that would be the Secretaría General del Movimiento (General Secretariat of the Movement) until 1977 and whose facade facing calle de Alcalá highlighted the yoke and arrows of great size that was its symbol.

Inside are touches of greenery and water, as continuation of the original gardens as well as a fountain of contemporary design in the center of the courtyard.