The monument was designed by architect Nikola Nikolov and opened on September 22, 1981, the 1300th anniversary of establishment of the Bulgarian state.[3]
After the end of the First World War, a group of Bulgarians proposed building the monument. However, strong opposition to the building of this monument arose. Some Bulgarian intellectuals argued that a monument of an unknown soldier is unacceptable since it would imply that the names of the soldiers have been forgotten. "Not a single soldier shall be forgotten who gave his life in this war and in all other wars for the freedom of Bulgaria!".[citation needed]
The monument was designed but was not displayed because of the above-mentioned arguments. The lion itself was considered an abuse for a long time because it was sitting. The pose was considered a metaphor of surrender to the national ideas.[citation needed]