Final answer:
The Lomas Rsi temples in the Barabar Hills mark a significant departure from the additive stacking methods in favor of subtractive rock-cut architecture, influencing the ornamental and structural elements of ancient Indian architecture.
Step-by-step explanation:
The Lomas Rsi (Rishi) temples from the Maurya Dynasty, found in the Barabar Hills and dating back to the 3rd century BCE, represent a pivotal shift in ancient Indian architecture. These temples exhibit a move from the additive method of stacking architectural elements to a subtractive approach where the structure is carved out of the natural rock, embodying a technique similar to the later excavated cave temples. The horse shoe shape is a distinctive architectural feature that diverged from previous styles and suggested evolutions in religious and cultural architectural practices during this period. This subtractive method had both ornamental and structural implications, as it allowed for the creative expression of intricate designs while also necessitating careful consideration of the rock's natural properties to ensure stability.
The significance of this architectural innovation is highlighted in the overall development of Indian architecture, as seen in the Gupta period with the Mahabodhi Temple, where the additive method was favored, making use of bricks and incorporating elaborate carvings of Buddha. This also points to a broader trend where Indian architecture began to integrate sculpture, painting, and construction more seamlessly, as evidenced at the Nalanda University site.