Deaths
June 5, 1826
Carl Maria Friedrich Ernst von Weber was a German composer, conductor, pianist, guitarist and critic, one of the first significant composers of the Romantic school.

July 4, 1826
Thomas Jefferson was an American Founding Father who was the principal author of the United States Declaration of Independence (1776) and the third President of the United States (1801–1809). At the beginning of the American Revolution, Jefferson served in the Continental Congress, representing Virginia.

October 25, 1826
Philippe Pinel was a French physician who was instrumental in the development of a more humane psychological approach to the custody and care of psychiatric patients, referred to today as moral treatment. He also made notable contributions to the classification of mental disorders and has been described by some as "the father of modern psychiatry".