Photos show how the poor lived in cramped tenements while the rich built multiple mansions. The Gilded Age's wealth inequality eventually ... mansion built by Cornelius Vanderbilt II, and Marble House ...

“Places like that were very much the product of the new money of the time, as you can see in ‘The Gilded Age,’” said David ...

Marble House was Alva Vanderbilt's 39th birthday present. She later became a leader in the women's suffrage movement.

At one point, Feinberg and Coxe convinced “The Gilded Age” creator Julian Fellowes to visit Newport’s mansions, setting up a candlelight dinner at Marble Head, complete with a harpist.

The Gilded Age was a period of enormous wealth for some and extreme poverty for others. Photos show how the poor lived in cramped tenements while the rich built multiple mansions.