The FOCSA Building is a residential and commercial block in the Vedado neighborhood of Havana, Cuba. At 121 meters (397 ft), it is the tallest building in Cuba. It was named after the contracting company Fomento de Obras y Construcciones, Sociedad Anónima, and the architects were Ernesto Gómez Sampera (1921–2004), Mercedes Diaz, and Martín Domínguez Esteban (1897-1970), who was the architect of the Radiocentro CMQ Building. The structural engineer was Luis Sáenz Duplace, of the firm Sáenz, Cancio & Martín, and professor of engineering at the University of Havana. The civil engineers were Bartolome Bestard and Manuel Padron. Gustavo Becquer and Fernando H.Meneses were the mechanical and electrical engineers, respectively. It is located on a site bordered by Calles 17 and M and Calles 19 and N in the Vedado.

Havana is the capital and largest city of Cuba. The heart of the La Habana Province, Havana is the country's main port and commercial center. It is the most populous city, the largest by area, and the second largest metropolitan area in the Caribbean region. The population in 2002 was 2,137,847 inhabitants, and its area is 728.26 km2 (281.18 sq mi) for the capital city side and 8,475.57 km2 for the metropolitan zone.