Around the back of the Iglesia de San Andrés, the delightful Plaza de la Paja slopes down into the tangle of lanes that once made up Madrid's Muslim quarter. In the 12th and 13th centuries, peasants brought a portion of their harvest here to give to the bishop, whose chapel sits at the top of the square. Down the bottom is the walled Jardín del Príncipe Anglona, a recently remodeled 18th-century garden that retains its original brick walkways.