Labels:text | circle | symmetry OCR: MARTIS CIRCVLVS n Leonardo's time, ORBITA QVATYO earth, water, air, and fire, ARIS THAS the four building blocks of nature, LA NE SACHAY were thought to be arranged R. V. M Ly in concentric spheres. CURRICVLVM ITER VENERIS Earth, the heaviest element, MER lay at the center. VRI