An immense building that wedded the Baths of Caracalla with a soaring steel-and-glass concourse, the station was a destination satisfactory to the vainest of the demigods who entered it: Presidents and movie stars, dukes and duchesses.Greeting the celebrities who passed through Cassatt???s palace was the job of William Egan, the Stationmaster, and George Flatow, a former stenographer hired in 1909