<P> The Echigo - Tsumari Art Triennial is an international modern art festival held once every three years in the Niigata prefecture, Japan . The festival was created by the Tokyo commercial gallery Art Front Gallery (AFG) and is directed by Fram Kitagawa . It was first held in 2000 for a "grand" two - month exhibition in "communities, rice fields, vacant houses, and closed schools across a 760 square kilometer (187,800 acre) region ." In 2009 the pieces included a silver "croquette" house serving a croquette of locally harvested potatoes, a herb shop, a giant grasshopper slide, and a sculpture of a giant man . </P>

How many pieces of artworks were shown in the echigo-tsumari art triennale 2015