it was one thing to build a glass cathedral in california and another to build a corporate headquarters skyscraper in the center of manhattan the showcase of modern architecture shortly after the crystal cathedral working in collaboration with john burgee he completed one of his most recognizable buildings the att building later named the sony building and now  madison avenue built between  and  a skyscraper with an eight-story high arched entry and a split pediment at the top which resembled an enormous piece of th-century chippendale furniture it was not the first work of postmodern architecture- robert venturi and frank gehry had already built smaller scale postmodern buildings and michael graves had completed the portland building in portland oregon – two years before the att building and most of the building was in a traditional modernist style but because of its manhattan location and size it became the most famous example of postmodern architecture