It symbolizes the national organization since the Nation, organized was sancioned in 1853.
Inside it’s located the Flame Votive, it burns permanently as a tribute to those who gave their lives for the country. in its interior there lie the remains of the Unkwown Soldier.
In de lateral galleries of the Propilaeeum there are scultures representing the "Great American Homeland" in four stages: Aboriginal American, Colonial America, Constitutional America and the Future America.