Francisco Jareño y Alarcón (24 February 1818 – 8 October 1892) was a Spanish architect, author of one of the most remarkable official buildings of the Reign of Isabella II of Spain.

He entered the diocesan seminary as a young man to pursue ecclesiastical studies, remaining there for nine years.

Thanks to a scholarship, Jareño had the opportunity to go abroad and travel, over a period of four years, to various countries in Europe.

He returned to Madrid in 1855, where he was appointed Professor of Art History at the then Special School of Architecture.

[2] Of his first years of practice, the project of the Central School of Agriculture of Aranjuez of 1856 stands out, the first work that is known of Jareño, as well as the intervention, in collaboration with Nicómedes Mendívil, in the disappeared Spanish Mint, built in the space that today occupies the Plaza de Colón (Madrid).