See inside Marble House, Alva Vanderbilt Belmont’s 140,000-square-foot Newport mansion that appears in ‘The Gilded Age’

Marble House, a Newport mansion built by the Vanderbilt family, was the setting for scenes filmed for HBO's "The Gilded Age.

Marble House, a Newport mansion built by the Vanderbilt family, was the setting for scenes filmed for HBO's "The Gilded Age.

Marble House, a Newport mansion built by the Vanderbilt family, was the setting for scenes filmed for HBO's "The Gilded Age.