Unlike Achaemenian pillars which were constructed in segments, Mauryan pillars were primarily:

Correct Option

The correct option is Rock-cut monoliths.

Explanation

Mauryan pillars, specifically those erected during the reign of Emperor Ashoka, represent a significant transition from wood to stone in Indian architecture. A critical structural distinction exists between these pillars and the pillars of the Achaemenian Empire (Persia), which influenced them.

Detailed Analysis

• Mauryan Pillars: The shafts of Mauryan pillars were monolithic, meaning they were carved from a single, continuous block of stone (typically Chunar sandstone). They are characterized by a smooth, lustrous surface known as the "Mauryan polish" and a tapering shaft without a base.
• Achaemenian Pillars: In contrast, Achaemenian pillars were constructed using segments or stone drums stacked one upon another. They were often fluted (having vertical grooves) and stood on a distinct base, unlike the plain, base-less Mauryan shafts.
• Conclusion: While Achaemenian pillars relied on segmented construction, Mauryan pillars were distinctively rock-cut monoliths.

Key Takeaway: The defining structural characteristic of Mauryan pillars is that their shafts are monolithic (single stone) and smooth, whereas Achaemenian pillars are segmented and often fluted.