Real Casa de la Aduana
The Real Casa de la Aduana (Spanish: Real Casa de la Aduana means royal customs house) is the headquarters of Spain's Ministry of Economy and Finance. It is located on Madrid's longest street, the Calle de Alcalá.
The eighteenth-century building has been modified over the years. It was declared Bien de Interés Cultural in 1998.<ref name="bic">Template:Bien de Interés Cultural</ref>