English: The LeCarpentier-Beauregard-Keyes House in New Orleans, LA (1826). Pierre Gustave Toutant Beauregard married his second wife here in 1860. After the Civil War, he lived here from 1866 to 1868. PGT Beauregard was born to a sugar plantation and attended West Point; one of his instructors there later surrendered Fort Sumter to him. During the Mexican-American War, Beauregard served with distinction and was breveted to captain. After campaigning for Franklin Pierce, Beauregard was apointed to the U.S. Customhouse in New Orleans. He was unsuccessful in a bid for mayor of that city in 1858.

Upon the outbreak of the Civil War, Beauregard was appointed to the defenses of Charleston. He became the first general of the CSA when was he appointed on March 1, 1861. Beauregard ordered the first shot fired at Fort Sumter, officially beginning the war. The victory made Beauregard an instant hero in the South. He was reassigned to Virginia and led the CSA int he first Battle of Bull Run. He was promoted to full general before the start of the conflict, making him one of the seven ever appointed to the rank. This made Beauregard the 5th most senior official in the CSA. After the CSA success at Bull Run, Beauregard suggested a new battle flag for the Confederacy to make it more distinct from the Union. His crossed design became the most famous symbol of the CSA.

Beauregard feuded with other CSA commanders during the winter and he was transferred to the Army of the Mississippi in Tennessee under Albert Sidney Johnston. The loss at the Battle of Shiloh is generally attributed to the poor organizational choices of Beauregard, splitting the corps in lines rather than a united front. Furthermore, he ceased fighting after nightfall, allowing Grant to reorganize and receive reinforces. Johnston was killed in the conflict and Beauregard assumed control of the army. The ensuing Siege of Corinth, Beauregard was able to trick Union officers into believing that reinforcements were on the way. Although he did take significant losses in the siege, his withdrawal of the major rail junction is another controversial decision among historians. Beauregard fell ill during the conflict and left on medical leave without permission. He was replaced by Braxton Bragg.

Beauregard was reassigned to Charleston, successfully preventing its capture. Under Bragg, Beauregard surprised the Union with the Bermuda Hundred Campaign on the James River. Anticipating an attack on Petersburg, Beauregard moved his unit into the city in time for the Second Battle. His actions there, repelling an army of 16,000 with a disorganized 5,400 until Robert E. Lee was able to reinforce the position, is considered his finest war performance. In September 1864, he was reassigned to the Department of the West. The poor tactical decisions of John Bell Hood and the Army of Tennessee led the West to be serverely undersupplied. When William T. Sherman began his March to the Sea, Beauregard lacked the supplies to stop him. In disbelief over Sherman's rapid advance, Jefferson Davis dismissed Beauregard from his command. Beauregard spent the rest of the war doing medial tasks under the command of Joseph E. Johnston. Beauregard and Johnston convinced Davis to surrender the army on April 13, 1865. Beauregard returned to New Orleans after the war and received a pardon from Andrew Johnson. He led the New Orleans and Carrollton Street Railway from 1866 to 1876. Today, he is the namesake of Beauregard Parish and Camp Beauregard, a National Guard base.

In the 1950s, the house became home to Frances Parkinson Keyes. Keyes is known for her writings of life in Louisiana and Mississippi. Most of her works feature a strong Catholic theme and often tie into carnival celebrations. Her Madame Castel's Lodger is a fictionalized biography of Beauregard. She also wrote The Chess Players about former resident Paul Morphy, a world chess champion who grew up in the house during his childhood. Keyes restored the house to its historic appearance.