classical rotunda 3d model

Classical circular rotunda pavilion, perfectly symmetrical architecture, circular stepped base with two concentric levels, seven evenly spaced Ionic columns clearly visible around the perimeter, thick printable columns with fluted shafts, circular entablature with dentil molding, large shallow circular roof with smooth dome profile, open center, no walls, no furniture, no plants, no decorations, no hanging elements. Clean CAD-style architectural model, watertight geometry, manifold mesh, single coherent structure, optimized for 3D printing, thick structural details, balanced proportions, white clay material, highly accurate geometry, engineering visualization, product design render, studio lighting, isolated on white background. Seven columns must be clearly separated and visible. Circular symmetry. Architectural scale model. High detail. Precision model. Printable sculpture.