After being granted authorisation in June 1887,[1] María Diega Desmaissières y Sevillano [es] (1852–1916), Countess of Vega del Pozo, commissioned the project for the construction of a mausoleum for herself to Ricardo Velázquez Bosco.

She inherited a large fortune, and devoted an important part of it to cultural patronage.

[3] The building has a floor plan shaped like a greek cross, and it is built in stone from Novelda.

[4] The interior of the building displays works by Alejandro Ferrant (a painting on the high altar) and bronze and marble sculptures by Ángel García Díaz [es], including the four angels flanking the sarcophagus in the pantheon's crypt.

[4][2] The design of the vault inspired a number of works by Velázquez Bosco's disciple Antonio Palacios.