First Lady of the United States Ellen Lewis Herndon Arthur, c. 1857-1870.
Source: Library of Congress

First Lady of the United States Ellen Lewis Herndon Arthur, c. 1857-1870.

Source: Library of Congress

Mathew Brady, Tad Lincoln, son of Abraham Lincoln, in military-style uniform, ca. 1860s.
Source: Library of Congress

Mathew Brady, Tad Lincoln, son of Abraham Lincoln, in military-style uniform, ca. 1860s.

Source: Library of Congress

Lou Henry Hoover, wife of President Herbert Hoover, on a burro in Acton, California, 22 August 1891.

Lou Henry Hoover, wife of President Herbert Hoover, on a burro in Acton, California, 22 August 1891.

First Lady of the United States Frances Folsom Cleveland, ca. 1886.
Source: Library of Congress

First Lady of the United States Frances Folsom Cleveland, ca. 1886.

Source: Library of Congress

First Lady of the United States Ida McKinley, 1897-1901.

First Lady of the United States Ida McKinley, 1897-1901.

Elliott Roosevelt and his three children (from left to right), Hall, Eleanor, and Elliott, Jr., 1892.

Elliott Roosevelt and his three children (from left to right), Hall, Eleanor, and Elliott, Jr., 1892.

Harriet Lane Johnston, 1855-1865.
Source: Brady-Handy Photograph Collection (Library of Congress)

Harriet Lane Johnston, 1855-1865.

Source: Brady-Handy Photograph Collection (Library of Congress)

Nancy Reagan, 1950.
Source: Ronald Reagan Library

Nancy Reagan, 1950.

Source: Ronald Reagan Library

Harris & Ewing, President Woodrow Wilson, seated at desk with his wife, Edith Bolling Galt, standing at his side, June 1920.
Source: Library of Congress, Harris & Ewing Collection

Harris & Ewing, President Woodrow Wilson, seated at desk with his wife, Edith Bolling Galt, standing at his side, June 1920.

Source: Library of Congress, Harris & Ewing Collection

Edith Luckett Davis with her daughter, Nancy Reagan, January 1931.

Edith Luckett Davis with her daughter, Nancy Reagan, January 1931.