Question: The Tomb of the Unknown Confederate Soldier is a tomb on the grounds on the estate of what historic post-war home of the former President of the Confederate States of America, Jefferson Davis?

Context paragraphs:
Moses Wright Hannon: Moses Wright Hannon (December 14, 1827 – June 3, 1897) was a Confederate States Army colonel during the American Civil War.  In August 1864, he was assigned to duty as an acting brigadier general by General John Bell Hood, subject to appointment by Confederate President Jefferson Davis and confirmation by the Confederate Senate.  Although Hannon commanded a brigade in the cavalry corps of the Army of Tennessee and in Major General Joseph Wheeler's cavalry corps from June 1864 until the end of the war, he never was officially appointed by Jefferson Davis and confirmed by the Confederate Senate to brigadier general rank.

Tomb of the Unknown Confederate Soldier: The Tomb of the Unknown Confederate Soldier is a tomb on the grounds of Beauvoir in Biloxi, Harrison County, Mississippi, that holds the remains of an unidentified Confederate soldier of the American Civil War.

Confederate Monument in Glasgow: The Confederate Monument in Glasgow, Kentucky, built in 1905 by the Kentucky Women's Monumental Association and former Confederate soldier John A. Murray, commemorates those who gave their lives in service for the Confederate States of America.  It is located on the side of Glasgow's courthouse.  The Confederate soldier, made of bronze, is at parade rest, and features details such as a bedroll, canteen, kepi hat, and rifle.  It stands on a limestone pedestal.

Confederate States peace commission: On February 15, 1861, the newly formed Congress of the Confederate States of America adopted a resolution empowering the President-elect Jefferson Davis to appoint a commission of three men to negotiate “friendly relations” with the federal government of the United States.  On February 25, newly inaugurated President Davis chose Martin J. Crawford of Georgia, John Forsyth of Alabama, and Andre B. Roman of Louisiana to serve as commissioners.  On February 27, President Davis wrote a letter to Abraham Lincoln, President-elect of the United States, introducing the commissioners as representatives of the government of the Confederate States.  The commission was not received by Lincoln.  On March 12, a letter was sent to William H. Seward, Secretary of State of the United States, introducing the commissioners and explaining their peaceful intent.  The commission was not received by Seward.  On March 15, the commission filed a memorandum which outlined how they had been ignored by Seward and Lincoln.  The commissioners were rejected because acceptance of the commission would be recognition of the Confederate States of America.

2nd Confederate States Congress: The Second Confederate States Congress, consisting of the Confederate States Senate and the Confederate States House of Representatives, met from May 2, 1864, to March 18, 1865, during the last year of Jefferson Davis's presidency, at the Virginia State Capitol in Richmond, Virginia, Confederate States.  Its members were elected in the 1863 Confederate Congressional elections.

Beauvoir (Biloxi, Mississippi): The Beauvoir estate is notable as the historic post-war home (1876-1889) of the former President of the Confederate States of America, Jefferson Davis, (1807/08-1889), (who was also former U.S. Representative, (1845-1846), and more influentially as United States Senator from Mississippi, (1847-1851, 1857-1861) and in between U.S. Secretary of War, (1853-1857), under 14th President Franklin Pierce).  Its construction was begun in 1848 facing the Gulf Coastline (Gulf of Mexico) at Biloxi, Mississippi.  It was purchased earlier in 1873 by the planter Samuel Dorsey and his wife Sarah Dorsey.  After her husband's death in 1875, the widow, Sarah Ellis Dorsey learned of former Confederate President Jefferson Davis' difficulties.  She invited him to visit at the plantation and offered him a cottage near the main house, where he could live and work at his memoirs (""Rise and Fall of the Confederate Government"").  He ended up living there the rest of his life.  The house and plantation have since been designated as a National Historic Landmark, recognized and listed by the U.S. Department of the Interior and its National Park Service (established 1916).

John Holt Duncan: John Holt Duncan (1820–1896) was one of eight founders of Beta Theta Pi, a prominent college fraternity founded at Miami University in 1839 and was its first president.  He made a career in law as a lawyer and judge in Houston & Bexar County, Texas.  He served as a Confederate Artillery Captain in the 31st Texas Cavalry during the Civil War.  He lost a leg as a result of a battle wound on September 20, 1862 at the First Battle of Newtonia.  He was taken in by an Old Confederate soldier's family.  When the soldier returned home, Duncan was found by the authorities.  Because housing a confederate soldier was punishable by death, the old soldier was executed in front of his wife and family.  The family begged for Duncan's life to be spared and it was.  John Holt Duncan spent the rest of his life caring for the family and he died penniless because of it.  After the war he moved to Houston, Texas where he practiced law (district justice 1864-65, city attorney 1877-79.  He became Chief Justice of Bexar County.  He died in the Confederate Old Soldier's Home in Austin, Texas in 1896 and was buried in the Confederate Veterans section of the Texas State Cemetery.

Jefferson Davis Memorial Historic Site: Jefferson Davis Memorial Historic Site (also known as the Jefferson Davis Capture Site) is a 12.668 acre state historic site located in Irwin County, Georgia that marks the spot where Confederate States President Jefferson Davis was captured by United States cavalry on Wednesday, May 10, 1865.  The historic site features a granite monument with a bust of Jefferson Davis that is located at the place of capture.  The memorial museum, built in 1939 by the Works Progress Administration, features Civil War era weapons, uniforms, artifacts and an exhibit about the president's 1865 flight from Richmond, Virginia to Irwin County, Georgia.

Confederate States Army: The Confederate States Army (C.S.A.) was the military ground force of the Confederate States of America (Confederacy) during the American Civil War (1861-1865).  On February 28, 1861, the Provisional Confederate Congress established a provisional volunteer army and gave control over military operations and authority for mustering state forces and volunteers to the newly chosen Confederate president, Jefferson Davis (1808-1889), a graduate of the U.S. Military Academy on the Hudson River at West Point, New York, and colonel of a volunteer regiment during the Mexican–American War (1846-1848), later a United States Senator from Mississippi and U.S. Secretary of War in the administration of 14th President Franklin Pierce (1853-1857).  By March 1861, the Provisional Confederate Congress expanded the provisional forces and established a more permanent Confederate States Army.

Confederate States presidential election, 1861: The Confederate States presidential election of 1861 was the first and only presidential election held under the Permanent Constitution of the Confederate States of America.  Jefferson Davis, who had been elected President and Alexander H. Stephens, who had been elected Vice President, under the Provisional Confederate States Constitution, were elected to six-year terms (February 22, 1862 – February 22, 1868) as the first permanent President and Vice President of the Confederate States of America.

Supporting paragraphs: Tomb of the Unknown Confederate Soldier Beauvoir (Biloxi, Mississippi)
Answer: Beauvoir