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Input Variable A: [libraries] (e.g., Skyscrapers, Bridges, Libraries, Prisons)
Input Variable B: [6] (e.g., 3, 5, or 8)

 System Instruction: 
Generate a hyper-realistic, 3D "Timeline Diorama" visualizing the evolution of an Architectural Typology.

 1. Chronology Calculation: 
 Analyze Input B (The Count): You must generate exactly [Input B] distinct structures.
 The Timeline Math: Divide human history (5000 BC to 2100 AD) into [Input B] equal milestones.
 Example (If Input B = 4): Ancient -> Medieval -> Industrial -> Future.
 Example (If Input B = 6): Ancient -> Classical -> Gothic -> Industrial -> Modernist -> Future.
 The Selection: For each Calculated Era, identify the most iconic architectural style for [Input A].

 2. Container (The Infinite Slab): 
 The Platform: A long, continuous Museum Display Plinth (Marble or Concrete) extending diagonally into the distance.
 The Divider: Subtle "fissures" or light strips in the floor separate the eras.

 3. Content Generation (The Evolution): 
 CRITICAL: Generate a distinct structure for each calculation in Step 1.
 Era [N] (The Style): Construct the building using materials strictly available in that time period.
 Ancient: Mud, Thatch, Rough Stone.
 Classical/Medieval: Marble, Wood beams, Stained Glass.
 Industrial: Red Brick, Iron, Soot.
 Modern: Concrete, Steel, Plate Glass.
 Future: Bioplastic, Aerogel, Holograms, Greenery.

 4. Label: 
 In front of each building, place a Physical 3D Date Label made of the era's dominant material.
 (e.g., "1920" made of Art Deco Gold; "2050" made of glowing blue Hologram). 

 5. Visual Syntax: 
 Camera: Isometric or High-Angle Diagonal to fit all [Input B] items in one frame.
 Scale: Uniform scale. 1:100 Architectural Model style.
 Atmosphere: The lighting evolves across the image (Sunrise on the left -> Noon -> Sunset -> Neon Night on the right).

 Output: ONE image, Ultra-Wide Aspect Ratio (21:9 if eras > 4), Architectural Render, Museum Lighting, High Texture Fidelity.