Question: Which monument at the foot of Congress Column is in dedication to the services of an unknown soldier and to the common memories of all soldiers killed in any war?

Context paragraphs:
The Unknown Warrior: The British tomb of The Unknown Warrior holds an unidentified British soldier killed on a European battlefield during the First World War.  He was buried in Westminster Abbey, London on 11 November 1920, simultaneously with a similar interment of a French unknown soldier at the Arc de Triomphe in France, making both tombs the first to honour the unknown dead of the First World War.  It is the first example of a Tomb of the Unknown Soldier.

Military history of the Warsaw Uprising: The Warsaw Uprising began with simultaneous coordinated attacks at 17:00 hours on August 1, 1944 (W-hour).  The uprising was intended to last a few days until Soviet forces arrived; however, this never happened, and the Polish forces had to fight almost without any outside assistance.  Initially the battle raged throughout most of Warsaw, but after a short time it became confined to districts in the West of the town.  The key factor in the battle was the massive imbalance of weapons between the two sides.  The German side was extremely well equipped whilst the Polish side had, initially, barely enough ammunition for a few days.  The policy of "one bullet, one German" allowed the Polish fighters to sustain the uprising for many weeks at the cost of their own lives.  Some areas fought for a full 63 days before an agreed capitulation took place.  The losses on the Polish side amounted to 18,000 soldiers killed, 25,000 wounded and over 250,000 civilians killed; those on the German side amounted to over 17,000 soldiers killed and 9,000 wounded.

Commemoration Day of Fallen Soldiers: Commemoration Day of Fallen Soldiers (Finnish: "kaatuneiden muistopäivä" ) is the commemoration day observed in Finland on the third Sunday of May for the soldiers killed in the Winter War and Finnish Civil War 1918.  After 1940 it was also the day of commemoration of the soldiers killed in the Continuation War and the Lapland War.  There were also members of Lotta Svärd, who also were victims of war serving in uniforms on the front.  Nowadays the day also commemorates Finnish soldiers killed in United Nations peacekeeping missions.

The Unknown Soldier (1955 film): The Unknown Soldier (Finnish: "Tuntematon sotilas" ) is a Finnish film directed by Edvin Laine and premiered in December 1955.  It is based on "The Unknown Soldier", a novel by Väinö Linna.  The story is about the Continuation War between Finland and the Soviet Union as told from the viewpoint of ordinary Finnish soldiers.  The film was and remains the most successful movie ever in Finland; about 2.8 million people, or more than half the Finnish population, saw it in theaters.  Its portrayal of Linna's characters is widely accepted as canonical.

Tomb of the Unknown Soldier: The Tomb of the Unknown Soldier refers to a monument (cenotaph) in dedication to the services of an unknown soldier and to the common memories of all soldiers killed in any war.  Such tombs can be found in many nations and are usually high-profile national monuments. Throughout history, many soldiers have died in war with their remains being unidentified.  Following World War I, a movement arose to commemorate these soldiers with a single tomb, containing the body of one such unidentified soldier.

Congress Column: The Congress Column (French: "Colonne du Congrès" ; Dutch: "Congreskolom" ) is a monumental column situated on the Place du Congrès / Congresplein in Brussels, Belgium which commemorates the creation of the Constitution by the National Congress between 1830-31.  It was erected on the initiative of Charles Rogier, according to a design by Joseph Poelaert, between 1850 and 1859 and was inspired by Trajan's Column in Rome.  At the top of the column is a statue of Belgium's first monarch, King Leopold I, and the pedestal is surrounded by statues personifying the four freedoms guaranteed under the Constitution while the Belgian Tomb of the Unknown Soldier is at the foot of the column.

Tomb of the Unknown Soldier (Damascus): The Tomb of the Unknown Soldier (Arabic: ضريح الجندي المجهول‎ ‎ ) is a war memorial, dedicated to the Syrian soldiers killed during battle.  It is visited every year by the President of Syria on Martyrs' Day (May 6).

Tomb of the Unknown Soldier (Athens): The Tomb of the Unknown Soldier (, "Mnimío tou Agnóstou Stratióti" ) is a war memorial dedicated to the Greek soldiers killed during war.  It was sculpted between 1930-32 by sculptor Fokion Rok.  It is located in Syntagma Square in Athens.

Tomb of the Unknown Soldier (Moscow): The Tomb of the Unknown Soldier (Могила Неизвестного Солдата in Russian, ] ) is a war memorial, dedicated to the Soviet soldiers killed during World War II.  It is located at the Kremlin Wall in the Alexander Garden in Moscow.

Firdos Square: Firdos Square (Arabic: ساحة الفردوس‎ , "Sāḥat al-Firdaus " ‎ ) is a public open space in Baghdad, Iraq.  It is named after the Persian word "Firdows", which means "paradise".  The 17 Ramadan Mosque and two of the best-known hotels in Baghdad, the Palestine Hotel and the Sheraton Ishtar, are located on the square.  The roundabout in the center of Firdos Square has been the site of several monuments beginning with the completion of the monumental arch "The Unknown Soldier" in 1959.  It was subsequently replaced by the statue of Saddam Hussein that was torn down by U.S. coalition forces during the invasion of Iraq in 2003.  A green, abstract sculpture by Bassem Hamad al-Dawiri was commissioned to replace the Saddam statue.  In 2009, the architect of the Monument to the Unknown Soldier Rifat Chadirji expressed interest in rebuilding the monument on its original site.  As of 2013, the al-Dawiri statue and the surrounding columns have been removed from Firdos Square.

Supporting paragraphs: Congress Column Tomb of the Unknown Soldier
Answer: Tomb of the Unknown Soldier