The Richards Medical Research Labs are located in this city, as is the Vanna Venturi house.  
A never-built plan for a new city hall for this city had a tetrahedron base and made use of differently sized hollow capital joints, some big enough to walk through. A two hundred million dollar glass vault was added by Rafael Vinoly to spice up a concert hall in this city. A series of buildings in this city have large concrete shafts, coated in bricks, to house air ducts and stairwells, and are connected to the Goddard Labs.  Four serving and servant spaces alternate in the Margaret Esherick House in this city designed by (*) Louis Kahn. A postmodern house in this city was built while its architect was writing Complexity and Contradictions in Architecture and has a pentagonal facade which breaks above the door and below the prominent chimney.  The Richards Medical Research Labs are located in this city, as is the Vanna Venturi house.  For 10 points, name this city whose city hall is topped with a statue of Ben Franklin.
A never-built plan for a new city hall for this city had a tetrahedron base and made use of differently sized hollow capital joints, some big enough to walk through.
Philadelphia, Pennsylvania