Final answer:
Trajan's Victory Column is adorned with a spiral frieze featuring 2350 figures in low relief, depicting the Roman army during the Dacian Wars.
Step-by-step explanation:
The type of sculpture that adorns Trajan's Victory Column is a spiral frieze that portrays the Dacian Wars with 2350 detailed figures carved in low relief. This frieze wraps around the entire Column, creating a continuous narrative of the Roman army's conquests and daily life during the campaigns. Originally, these carvings were complemented by metal spears and swords held by the carved army, enhancing the three-dimensional aspect of the scenes. The intricate low relief work and the sheer amount of figures depict a complete visual record of the prowess and success of the Roman military.