# Ptolemaic and LLM Architecture Compared (In 3D)

> Source: <https://celestial-llm-mirror.vercel.app/>
> Published: 2026-07-15 02:29:14+00:00

# The Celestial Mirror

The Ptolemaic architecture of the cosmos — Earth, the seven planetary spheres, the Stellatum, the Primum Mobile, and what lies beyond. After Michael Mangialardi’s essay on medieval cosmology and LLM architecture.

[Read the paper ↗](https://michaelmangialardi.substack.com/p/the-celestial-mirror-how-medieval)

Planet maps © [Solar System Scope](https://www.solarsystemscope.com/textures/) (CC BY 4.0)

The Celestial Mirror

“…a series of hollow and transparent globes, one above the other…”

— C.S. Lewis, The Discarded Image

Ascend from the motionless Earth through the seven planetary spheres to the Stellatum and the Primum Mobile — up to the one boundary no geometry can cross. Then toggle the view, and climb the same tower as a transformer: token to layer to fixed constellation, with the very same line drawn at the top.

[Read the paper: The Celestial Mirror ↗](https://michaelmangialardi.substack.com/p/the-celestial-mirror-how-medieval)