SUMMA ART FAIR 59 GALLERIES FROM 17 COUNTRIES PRESENTING MORE THAN 130 ARTISTS TURNING MADRID INTO AN INTERNATIONAL ARTISTIC HUB MATADERO MADRID Paseo de la Chopera, 14 28045 Madrid, Spain +34 915 17 73 09 Madrid needed Summa: an international contemporary art fair looking to revolutionize the traditional model of the exhibitions playing with the relationship between…