On the other side of Cibeles Square from the Correos building, Spain's most prestigious bank is housed in an equally impressive 19th-century French Second Empire-influenced landmark designed by Eduardo Adaro and Severiano Sanz de Lastra. Standouts inside include a Carrara marble stairway, glass-domed central patio, and a variety of stained-glass windows. Guided tours can be arranged, and the bank's collection of Goyas can be viewed by appointment.