after four years as a solo practitioner johnson invited alan ritchie to join him as a partner ritchie had been a partner for many years in the johnson-burgee office and was the partner-in-charge of the att building and the  south lasalle street office building in  they formed the new practice of philip johnson>alan ritchie architects during the next ten years they worked closely together and yet again explored new directions in architecture designing buildings as sculptural objects some of the buildings that expressed this were the chapel of st basil at the university of st thomas the cathedral of hope in dallas the habitable sculpture a -story apartment tower in lower manhattan the children museum in guadalajara mexico the chrysler center and ddc showroom in ny one of his last designs with alan ritchie completed after his death was the urban glass house a condominium building in lower manhattan which was an urban expression from his own earlier work his famous glass house residence the final building he designed with richie was the pennsylvania academy of music building in lancaster pennsylvania which was completed in  alan ritchie now co