The article discusses the largest theft in history from the Isabella Stewart Gardner Museum in Boston in 1990 where 13 artworks were stolen, including works by Rembrandt, Manet and Vermeer. The stolen pieces had a combined insurance value of around half a billion dollars today and despite multiple investigations, the stolen works and the identity of the thieves remain unknown nearly 30 years later, making it one of the greatest unsolved art heists in history.