<br /> <p>This video, shot by Jason Knight, shows the 110-foot-high anamorphic wall painting ‘Square with Four Circles’</a>. The painting was made in 2010 by the artist Felice Varini</a>. The illusion becomes obvious as the person holding the camera moves away from the piece, revealing the square and circles mentioned in the artwork title. Credit: YouTube/Jason Knight</p><br />
