Detail of a spiral staircase in the Leaning Tower of Pisa, Italy

Intricate spiral staircase crafted from smooth, durable stone, showcasing distinct, weathered surfaces. The tight, curved steps form a circular pattern around a central column, creating a dynamic, twisting effect. Varied shades of gray highlight the natural texture and veining of the stone, emphasizing depth and movement. The precise masonry reflects historical architectural techniques, capturing a sense of timeless elegance and structural ingenuity.