If you have been through the Market East neighborhood recently, you might have noticed that there is scaffolding on the 12th Street side of the Market (and a little on Arch Street and Filbert Street as well). The convention center has begun the arduous process of replacing the roof from the Reading Terminal Headhouse on Market Street all the way to the Race Street side of the convention center (and include the Market's roof). The target date of completion is November 2017.
The good news is that the Market will remain open as usual throughout the construction (all 10 sets of doors are still accessible). So, please come shop and dine as usual!