 The café itself opened on July 9, 1916, and when completed in 1917 the building became one of the tallest in the city with a corner turret rising .Illuminated from the inside with electric lighting, the turret featured stained glass windows and decorative windmill sails.El Molino and Galería Güemes were two of Gianotti's greatest works and represent important examples of Art Nouveau style architecture in Buenos Aires.