PROMPT: Ultra-precise technical line-art vector drawing of the Colosseum, width 600 mm. Clean monochrome blueprint style, CAD-like, engineering diagram. Closed paths only, no fills. Detailed arches, pillars, cornices. External joints on all sides (top, bottom, left, right): male joints 10 mm × 3 mm, female joints 10.15 mm × 3 mm. Internal structural grid 6×4 with alternating male/female joints. Grid cell size 100 mm × 87.5 mm. Perfect alignment, no distortion. Laser-cut vector plan style. Ultra clean, high precision. NEGATIVE PROMPT: no shading, no shadows, no grayscale, no colors, no gradients, no textures, no blur, no noise, no glow, no soft edges, no thick lines, no double lines, no broken lines, no open paths, no incomplete shapes, no filled areas, no sketchy strokes, no artistic style, no cartoon, no 3D, no perspective distortion, no warped geometry, no curved joints, no misaligned grid, no missing joints, no overlapping lines, no bevels, no embossing, no drop shadows, no background, no objects, no people, no text, no symbols, no logos, no decorations, no random elements, no incorrect proportions, no deformation.

The image shows a sketch of the Colosseum in Rome, Italy, with a white background. It is a free printable coloring page, perfect for kids to enjoy.