The American poet Walt Whitman spoke publicly many times on Abraham Lincoln, the 16th president of the United States. A series of at least eleven lectures on Lincoln's life and his assassination began in Steck Hall in New York City on April 14, 1879, and concluded in Philadelphia on April 14, 1890, two years before Whitman's death. They were generally well received, and cemented the poet's public image as an authority on Lincoln. Whitman greatly admired Lincoln and was moved by his assassination in 1865 to write several poems honoring him, including "O Captain! My Captain!", which Whitman recited during some of the talks. The lecture in 1887 at Madison Square Theatre in New York City is considered the most successful of the series, and was attended by many prominent members of American society. Whitman later described its reception as "the culminating hour" of his life. (This article is part of a featured topic: Walt Whitman and Abraham Lincoln.)