An empty frame hangs on the wall of the Isabella Stewart Gardner Museum — part of a new restoration project.The painting once<a class="excerpt-read-more" href=" More

The remains of Boston's infamous Isabella Stewart Gardner Museum art heist are intact due to the will and testament of its owner. Everything must remain just as it was, and the museum is trying to do their best to maintain Stewart Gardner's wishes despite the art lost in the 1990 theft.

It's been 35 years since thieves stole more than a dozen works of art during a 1990 heist in Boston. It remains the most tantalizing art heist mystery in the world.