Altar of the Fatherland , Rome , Italy

What is inside the Altar of the Fatherland?
The Tomb of the Unknown Soldier

His tomb is one of the monuments located inside the Altar of the Fatherland and the initial idea to build it came from Colonel Giulio Douhet, who proposed to bury the remains of an unknown soldier to symbolically embody all the Italian dead and missing in the First World War.