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The Lincoln Memorial and reflecting pool, photographed one year after its dedication, on May 2, 1923.

Workers position the cornerstone of the memorial building in 1914.

Construction begins on the memorial in January of 1915.

Much of the foundation for the building and the main steps, under construction in January of 1915.

The walls of the inner chamber go up in 1915.

The 36 columns in place, work is underway on the frieze, where the names of the 36 states in the Union at the time of Lincoln's death are inscribed, photographed in 1915.

Marshland in front of the Lincoln Memorial, near the Potomac River, in 1917. Work is underway to turn this site into the 2,000-foot-long reflecting pool.

The Lincoln Memorial under construction, with the Potomac in the back-ground, and several Navy and Munitions Buildings in the foreground, on Constitution Avenue, circa 1919.

Aerial view of construction, nearing completion, in 1919.

Clearing the space for the massive reflecting pool, between 1915 and 1923.

Ice skating on the frozen reflecting pool in January of 1922.

Finishing touches are made to the huge statue of Abraham Lincoln, which stands just inside the entrance of the Lincoln Memorial, prior to its dedication in Washington, D.C., on May 30, 1922.

The poet Edwin Markham reads his poem Lincoln, the Man of the People at the official dedication of the Lincoln Memorial on May 30, 1922.

An amphibious aircraft takes off from the reflecting pool in front of the Lincoln Memorial in 1923.

The Stafford Pemberton dancers gamboling on the green before the Lincoln Memorial reflecting pool with the Washington monument in the background on January 10, 1930.

George Washington University co-ed rifle team posing on the lawn of the Abraham Lincoln Memorial - 1930

Local children take advantage of the snow strewn over the steps of the Lincoln Memorial, converting the slope into a hill for sledding on February 9, 1935.

Thousands stand before the Lincoln Memorial and listen to the noted African American contralto Marian Anderson as she gives a free concert - 1939

Soldiers with a machine gun set up near the Lincoln Memorial to guard the Memorial Bridge approach to Washington, D.C., on December 8, 1941.

U.S. Civil Rights leader Martin Luther King, Jr. waves to supporters from the steps of the Lincoln Memorial on August 28, 1963.

The statue of Abraham Lincoln at the Lincoln Memorial gets its annual spring cleaning in the pre-dawn hours of April 12, 1995.

U.S. President-elect Barack Obama speaks during the Inaugural Celebration at the Lincoln Memorial in Washington, D.C., on January 18, 2009.

The statue of Abraham Lincoln by the artist Daniel Chester French, photographed on April 1, 2015.

Fireworks explode over the Lincoln Memorial, in celebration of Independence Day in Washington, D.C., on July 4, 2015.

The Lincoln Memorial covered in snow after a storm on January 23, 2016, in Washington, D.C.

A woman bounces at the bottom as she sleds down the snow-covered steps of the Lincoln Memorial on January 24, 2016.