Originally, a total of 20 paintings make up the collection called "Art Dollar", which now become "NFTs Art-Dollar Cllection". The original works, painted in oil on 100 x 100 cm canvas, were exhibited for the first time in April 2003 at the Mehr Licht Gallery in San Juan de Puerto Rico, USA, prefaced by texts by the Spanish writers Raúl Guerra Garrido, Manuel Talens and Anna Maria Cian. The origin of that collection was the author's conference on "Art and the market" at the university forum in Clermont-Ferrand, France, in 1996. The formal scheme of each work gives meaning to the collection: two defined parts, the lower part being a representation of the dollar that overlaps the theme and imposes itself as an aesthetic mark.