Historic Stone Arch Bridge Isometric Concept Sketch AI Image Prompt

Annotated architectural concept sketch: a hand-drawn isometric ink illustration of the historic Mostar-style stone arch bridge spanning a river, with clustered medieval stone buildings on both banks and two square watchtowers. Style: black graphite and technical pen linework, architectural field notebook look, detailed hatching, crosshatching, visible construction lines, rough perspective guide marks, on aged cream graph paper with evenly spaced square grid, monochrome black and gray ink only. Scene: main landmark is {argument name="bridge name" default="stone arch bridge"}, river is {argument name="river name" default="River Neretva"}, architecture: Balkan Ottoman-era stone buildings with tiled roofs, small rectangular windows, arched doorways, stacked hillside masonry, one cafe terrace at the lower right riverbank. Composition: wide landscape canvas, three-quarter aerial isometric view, left village cluster higher on the page, right village cluster lower, large single-span arch bridge centered diagonally across the river. Details: arched bridge deck with parapets, flagpoles with small flags along the bridge, stone textures, roof tile patterns, riverbank vegetation scribbles, light shadows beneath the bridge. Layout: labels with uppercase sans-serif handwritten style, curved arrow callouts, full-page visible square grid. Label items (8): "STONE BUILDINGS" (upper left, points to left cluster), "WATCHTOWER (LEFT)" (top center-left, points to left tower), "STONE ARCH BRIDGE" (upper center-right, points to main span), "FLAGS" (upper right of bridge, points to flagpoles), "WATCHTOWER (RIGHT)" (upper right, points to right tower), "STONE BUILDINGS" (right middle, points to right cluster), "CAFE TERRACE" (lower right, points to terrace), "RIVER NERETVA" (lower left river area, points to river). Text parameters: {argument name="left tower label" default="WATCHTOWER (LEFT)"}, {argument name="right tower label" default="WATCHTOWER (RIGHT)"}, {argument name="cafe label" default="CAFE TERRACE"}. Rendering instructions: generate a precise but hand-sketched architectural diagram, not a photorealistic image. Keep background clean and uncluttered, preserve the graph-paper notebook aesthetic, use strong line hierarchy for bridge and buildings, lighter sketch lines for terrain and river flow, and make every label legible in English.