This is a detail of one of the art nouveau style lamps at Casa Amatller on Passeig de Gracia, Barcelona. Of course the original is more beautiful but I hope this is enough teaser for you to visit the famous house and take a good look at it.
More about Casa Amatller in this previous post: Casa Amatller Modernist Stained Glass Ceiling
More about Casa Amatller in this previous post: Casa Amatller Modernist Stained Glass Ceiling