In southern France, Marie-Bernarde Soubirous, a 14-year-old French peasant girl, first claims to have seen the Virgin Mary, the mother of Jesus Christ and a central figure in the Roman Catholic religion. The apparitions, which totaled 18 before the end of the year, occurred in a grotto of a rock promontory near Lourdes, France. Marie explained that the Virgin Mary revealed herself as the Immaculate Conception, asked that a chapel be built on the site of the vision, and told the girl to drink from a fountain in the grotto, which Marie subsequently discovered by digging into the earth.

Minnesota enters the Union as the 32nd state on May 11, 1858.

On June 16, 1858, newly nominated senatorial candidate Abraham Lincoln addresses the Illinois Republican Convention in Springfield and warns that the nation faces a crisis that could destroy the Union. Speaking to more than 1,000 delegates in an ominous tone, Lincoln paraphrased a passage from the New Testament: “a house divided against itself cannot stand.”

After several unsuccessful attempts, the first telegraph line across the Atlantic Ocean is completed, a feat accomplished largely through the efforts of American merchant Cyrus West Field.

Senator Stephen Douglas of Illinois and Abraham Lincoln, a Kentucky-born lawyer and one-time U.S. representative from Illinois, begin a series of famous public encounters on the issue of slavery. The two politicians, the former a Northern Democrat and the latter a Republican, were competing for Douglas’ U.S. Senate seat. In the seven Lincoln-Douglas debates—all about three hours along—Lincoln argued against the spread of slavery while Douglas maintained that each territory should have the right to decide whether it would become free or allow slavery. Lincoln lost the Senate race, but his campaign brought national attention to the young Republican Party.

On September 15, 1858, the new Overland Mail Company sends out its first two stages, inaugurating government mail service between the eastern and western regions of the nation.

On October 27, 1858, future President Theodore Roosevelt is born in New York City to a wealthy family. Roosevelt was home-schooled and then attended Harvard University, graduating in 1880. He served in the New York state legislature from 1881 to 1884.