Luis M. Mansilla (1959-2012) and Emilio Tuñón Alvarez (1959) founded Mansilla + Tuñón Architects in 1992. Mansilla + Tuñón Architects was a Madrid based office, dedicated to the confrontation of theory, and academic practice, with design and building activity. They received the Spanish Fine Arts Gold Medal 2014, the Mies van der Rohe Award 2007, and the Spanish National Architecture Award 2003.

Emilio Tuñón and Luis Mansilla developed most of their academic carrer at the Architectural Design Department of the Architecture School of Madrid, as full professors. Additionally, they taught as visiting professors at Princeton University School of Architecture (springs 2008, 2009 and 2010), Harvard Graduate School of Design (spring 2006), Ecole Polytechnique Federale de Lausanne (spring 2005), Barcelona International Architecture School (2001-2002), Frankfurt Städelschule (1997-1998), Architecture San Pablo CEU Fundation (2000-2001), Barcelona Architecture School (1999-2000), New Puerto Rico  Architecture School (summer 2000) and Navarra Architecture School (springs 1999 and 2011).

In 1993 they created the thought exchange cooperative CIRCO, for which they publish a bulletin of the same name. This bulletin has been awarded the following awards: FAD Award (2007), 3rd. Iberoamerican Architecture and Engineering Biennial Publication Prize (2002) and COAM Annual Prize for Cultural Initiatives Award (1995). 

Mansilla + Tuñón won the following architecture competitions: International Center of Visigothic Culture in Toledo(2010), Energy Dome in the Enviromental City in Soria (2008), C.I.C.C.M. International Congress Center of Madrid (2007), Museum of Migrations in Algeciras (2007), Helga de Alvear Foundation in Cáceres (2005), Urban Planning for Valbuena in Logroño (2004), Public Library in Calle de los Artistas in Madrid (2003), Museum of Cantabria in Santander (2002), Spanish Royal Collections Museum in Madrid (2002), Sanfermines Museum in Pamplona (2001), Cultural Center in Brescia (2000), Castellón Fine Arts Museum (1998), Leon’s Concert Hall (1996), Madrid’s Regional Cultural Center (1995). 

Their projects include Atrio Hotel in Caceres (2012), Lalin Town Hall (2011), Helga de Alvear Foundation in Cáceres (2010),  Twin Houses in Tarifa (2009), Pedro Barrié de la Maza Foundation in Vigo (2005), MUSAC in León (2004), León Auditorium (2003),  Madrid Regional Documentary Center (2002), Castellón Fine Arts Museum (2000), Indoor Swiming-Pool in San Fernando de Henares (1998) and Zamora Museum (1996). 

Their work has been awarded the following prizes: Spanish Fine Arts Gold Medal 2014, FAD Award 2011, Aplus Award 2011, AD Architectural Digest Award (2009), Mies van der Rohe Award (2007), FAD award (2007), Saloni Award (2007), VIA award (2006), Spanish Architecture Award (2003), FAD Award (2001), COACV Award (2000), Excellent Work Award (2000), First Iberoamerican Architecture and Engineering Bienal (1998), Foundation CEOE Award (1997) and Arquitecti Award (1996).

Luis M. Mansilla passed away in Barcelona on February 22nd 2012. Emilio Tuñón continues his work under the name of Emilio Tuñón Arquitectos (