Gone are the days of the boring, unimaginative old school, ceiling tiled office. Locate your office in The Diamond Building and enjoy what our New Normal includes: ? Exposed Ceilings LED Lighting Exterior Signage Glass Enclosed Offices Exposed Brick Glass Enclosed Conference Rooms Stylish Barn Doors It’s not an upgrade. Its how offices should be designed and delivered! Discover More About the New Normal Office Design The Diamond Building, at Fifth and Liberty Avenues, is uniquely shaped as an irregular pentagon, one of the many buildings forced into odd shapes by the colliding property grids along Liberty Avenue.The building was designed by MacClure and Spahr, a Pittsburgh firm that gave us several other distinguished buildings, including the Union National Bank building on Fourth Avenue.