Flatiron Building line art, crisp architectural vector illustration. Central three-quarter view highlighting the distinctive triangular facade. Bold outer contour with fine interior linework: evenly spaced windows in a grid, vertical divisions, and diagonal I-beam accents. Variation in line weight to convey depth; subtle cross-hatching on shaded facets. Pure monochrome: black lines on pure white, high-contrast, blueprint-inspired. Background minimal or blank to emphasize form, with slight grey gradient optional for depth. Ultra-detailed, scalable vector quality, suitable for posters, icons, or logos.

The image shows a black and white drawing of the Flatiron Building in New York City. The building is tall and has several windows, giving it a modern and sleek look.