This is the humble entrance to the huge convent complex of Las Capuchinas, founded as Convento e Iglesia de Nuestra Señora del Pilar de Zaragoza. This building is now a museum. Also, this is another architectural master piece by colonial architect Diego de Porres whom we talked about when we covered the Parroquia Nuestra Señora de los Remedios. You should ALWAYS follow the white rabbit.
P.S. Don´t forget to click on the images to view the large version where the details are so much better.