From Santa María cathedral, a 110-yard walk down Calle Tiendas takes you to the old city's northern wall. Don't miss this 16th-century palace (now a public-records office), built by Juan Cano de Saavedra with the dowry provided by his wife, the Aztec princess Techichpotzin (known as Doña Isabel), daughter of the Aztec leader Montezuma (aka Moctezuma). It is closed to the public.
Pl. Conde de Canilleros 1, Cáceres, 10003, Spain