sentences:  Ai Weiwei's @Large featured seven installations across Alcatraz, including 176 portraits of various political exiles and prisoners of conscience, individuals including Edward Snowden, Nelson Mandela, and Martin Luther King Jr.The portraits were made of 1.2 million pieces of Legos and were on display in areas that were once the dining hall, laundry building, and A Block cells of the Island.The artist organized the show without ever visiting the site since the Chinese government restricts his travel.