The Fillmore Philadelphia - also known as "The Fillmore Philly" and, maybe, "The FillPhill" - is a 2,500 seat concert venue in the Fishtown neighborhood near the Delaware River waterfront in Philadelphia, Pennsylvania. The top floor of the building contains "The Foundry", a smaller "club within a club" for local bands and rising stars from around the country. The Fillmore was built inside the former Ajax Metal Factory, which they've remembered by calling the main performance area "Ajax Hall".