111 Huntington, the last "skyscraper" built as part of the Prudential Center. Often called the "Robot Building" or the "R2D2 Building" after its shape with round dome roof trusses, rumored to have been added as an afterthought to appease Mayor Menino's insistence that new skyscrapers have a "signature skyline element."
Wikipedia article:
http://en.wikipedia.org/wiki/111_Huntington_AvenueCategory:
tower office building Address:
Huntington Avenue, 111