Astonishingly Roman and opulently Baroque, the arcaded, multistory courtyard of this palazzo is a masterpiece of late-16th-century style. Designed by Carlo Maderno, it is a veritable panoply of sculpted emperor busts, heroic statues, sculpted reliefs, and Paleo-Christian epigrams, all collected by Marchese Asdrubale Mattei. Have your Nikon ready. The ground floor of the palazzo is home to the Centro Italiano di Studio Americani (Center for American Studies).
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