 The enclosed market is one of the oldest and largest markets in the country, hosting over a hundred merchants offering Pennsylvania Dutch specialties, artisan cheese and meat, locally grown groceries, and specialty and ethnic foods.The traditional Philadelphia accent is considered by some linguists to be the most distinctive accent in North America.The Philadelphia dialect, which is spread throughout the Delaware Valley and South Jersey, is part of a larger Mid-Atlantic American English family, a designation that also includes the Baltimore dialect.