PowerPoint Timeline Graphic for History Infographic

Educational infographic poster titled "History Timeline Graphic" in landscape layout, designed like a clean classroom slide example; text labels must be sharp, high-contrast, and fully readable in crisp sans-serif typography. Create a simple 4-stage numbered timeline infographic for history / civilization, with large sequence numbers, short captions, and clear connecting arrows running left to right across the page.

1. heading: "Ancient Civilizations", caption: "Early cities, writing, and organized societies begin.", visual: bold number 1 in a circle, a minimal icon cluster showing a stepped temple, clay tablet with lines, and small river curve; place this as the first milestone on the timeline.
2. heading: "Classical Era", caption: "Empires expand, philosophy grows, and trade networks connect regions.", visual: bold number 2 in a circle, a simplified columned building, scroll, and small trade route map line with dots; show this as the second milestone.
3. heading: "Medieval Period", caption: "Kingdoms, castles, and religious centers shape daily life.", visual: bold number 3 in a circle, a castle silhouette, shield, and arched window icon; place this as the third milestone.
4. heading: "Modern Age", caption: "Industry, science, and global communication transform civilization.", visual: bold number 4 in a circle, a factory gear, light bulb, and simplified globe with signal lines; place this as the final milestone.

Connect all stages with a thick horizontal timeline line, directional arrows between each milestone, and small dotted guide lines linking icons to their captions. Include subtle legend-style labels such as "Past to Present" and a tiny footer note area formatted like a presentation example, while keeping the overall text minimal. Use balanced spacing, simple boxes or circular nodes, clean infographic hierarchy, and a classroom-friendly presentation-slide aesthetic.

Visual style: minimal corporate, monochrome black & white palette only, flat vector shapes, thin black outlines, white background, soft gray fills for contrast, calm academic mood, uncluttered composition, magazine-grade editorial illustration, vector-clean lines, no photographic textures.

All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no watermarks Render labels and headings in clean English typography (sans-serif). No real-brand logos, no copyrighted characters, no people that could be identified, no graphic medical content. If the topic touches a regulated domain (medicine, finance, law), keep the explanation conceptual and add no specific dosages, prices or legal advice.