Traditional art from Argentina began as a simple decoration on the trade carts of bread, milk or vegetable sellers in the early 20th century. Later expanded to the decoration of buses and truck. Today it can be found all over the city of Buenos Aires, in shop windows, bars and restaurants, murals and signs. Fileteado mixes letters and ornaments, working with different layers of shadows and lights, in order to create a sense of volume and deepness. Flowers, acanthus leaves, ribbons, birds and pearls are among the most traditional elements. This vernacular style of Fileteado led to it being declared a World Cultural Heritage by UNESCO in 2015.