A woman takes a picture of a work titled "Heptagon and Octagon" by Monir Shahroudy Farmanfarmaian of Iran at the 29th Sao Paulo International Biennial September 23, 2010. Some 159 artists from 39 countries are exhibiting their artworks at the biennial, carrying the theme "There is always a cup of sea to sail in a line", according to the press release. The exhibition runs till December 12. REUTERS/Nacho Doce (BRAZIL - Tags: SOCIETY)