[President Theodore Roosevelt posing with another official on the deck of the steamer Mississippi]

Theodore Roosevelt Jr., (October 27, 1858 – January 6, 1919) was an American statesman, author, explorer, soldier, naturalist, and reformer who served as the 26th President of the United States from 1901 to 1909. With the assassination of President William McKinley, Theodore Roosevelt, not quite 43, became the 26th President (1901-1909). He brought new excitement and power to the office, vigorously leading Congress and the American public toward progressive reforms and a strong foreign policy. As a leader of the Republican Party during this time, he became a driving force for the Progressive Era in the United States in the early 20th century. He established many new national parks, forests, and monuments intended to preserve the nation's natural resources. In foreign policy, he focused on Central America, where he began construction of the Panama Canal. He greatly expanded the United States Navy and sent the Great White Fleet on a world tour to project the United States' naval power around the globe. His successful efforts to end the Russo-Japanese War won him the 1906 Nobel Peace Prize. Elected in 1904 to a full term, Roosevelt continued to promote progressive policies. After leaving office, Roosevelt went on safari in Africa and toured Europe. Returning to the USA, he became frustrated with Taft's approach as his successor. Roosevelt founded his own party, the Progressive, so-called "Bull Moose" Party, and called for wide-ranging progressive reforms. The split among Republicans enabled the Democrats to win both the White House and a majority in the Congress in 1912 fatally weakening the Republican Party. Frustrated at home, Roosevelt led a two-year expedition in the Amazon Basin, nearly dying of a tropical disease. During World War I, he opposed President Woodrow Wilson for keeping the U.S. out of the war against Germany, and offered his military services, which were never summoned. Although planning to run again for president in 1920, Roosevelt suffered deteriorating health and died in early 1919. Roosevelt has consistently been ranked by scholars as one of the greatest U.S. presidents. His face was carved into Mount Rushmore alongside those of George Washington, Thomas Jefferson, and Abraham Lincoln. "Whenever you are asked if you can do a job, tell 'em, 'Certainly I can!' Then get busy and find out how to do it."

Stereographs are devices capable of building a three-dimensional​ image out of two photographs that have about two and a half inches difference between them so that it could imitate the two eyes’ real field of view. Combining these images into a single one with the help of stereoscope, a person can experience the illusion of the image’s depth. Stereoscope uses the same principle as in human binocular vision. Our eyes are separated by about two inches, so we see everything from two different angles. When the brain combined those views in a single picture, we get the spatial depth and dimension. Stereographs were extremely popular between 1850 and 1930 all around the world. Millions of stereographs were made during that time. There was a broad range of themes: landscape, travel, historical moments, nature disasters, architecture and many others. Nowadays, simply launch this collection full screen and put your mobile device in Google Cardboard Viewer.

• [President Teddy Roosevelt posing with his Spanish-American War ...