Why is this the Oldest Food Market in North America?

I love visiting Farmer's Markets in my travels - it is always exciting to see and try the unique products of local producers. This is one of the best food markets that I have visited in the last couple of years - find out what it is and why it is the oldest food market in North America in my storyboard

Why is this the Oldest Food Market in North America?

Photo: theboutiqueadventurer.com