Here is a detailed 3D model of a 19th-century Neoclassical city palace / townhouse, precisely scaled for H0 (1:87) model railroading and diorama building. The model is based on historical architectural elevations and features:

Detailed Facade:
Four-axis layout with rusticated ground floor, fine pilasters, decorative cornices, and arched windows.
Mansard Roof:
Realistic slate/zinc roof texture with dormer windows.
Modular Design: Optimized for 3D printing (SLA / Resin recommended for fine details like window frames and decorative elements).
Dimensions (H0 Scale):Width: ~120.0 mm (based on 10.60 m prototype)
Scale: 1:87 (H0)

Print & Assembly Tips:
Window Frames & Doors: Designed to be printed separately for easier painting and clean assembly.
Clear Windows: Recesses are provided behind window frames to easily insert clear plastic sheets for glazing.
Tolerances: Outer frames include a ~0.1–0.15 mm clearance for smooth fitting after painting.
Recommended Printer: Resin (SLA) for window frames and fine roof textures; FDM suitable for main wall body.

Feel free to share your makes and painted versions!

https://moba.sternfahrer.com/modell/stadtpalais-3d-druck-baukasten/