In the past year or so, the topic of wealth inequality has finally received some attention from the media, politicians, and even some of the wealthiest people in the U.S., such as Warren Buffett who recently told an audience how ridiculous it is that his federal tax rate is lower than that of his secretary’s. In that context, have you ever wondered how today’s wealthiest Americans compare to their counterparts from the first half of the 20th century, when wealth inequality was just as great?

To give you a picture of this comparison across decades, the New York Times has a very interesting interactive graphic that compares the Wealthiest Americans of All Time. The results show, for example, that the richest American today (and probably the richest person on earth), Bill Gates, has an estimated wealth of $82 billion. However, that actually pales in comparison to the richest American of all time, John D. Rockefeller, whose wealth totaled $192 billion at its height.

It’s a pretty interesting comparison, with astronomical numbers involved.