Florence Baptistery
The octagonal baptistery opposite Florence Cathedral, with a thirteenth-century mosaic cupola; see Florence.
At a glance
| Source | Author | Role | In one line |
|---|---|---|---|
| There Are Places in the World Where Rules Are Less Important Than Kindness | Carlo Rovelli | subject | The cupola Rovelli thinks gave Dante the shape of a three-sphere universe. |
There Are Places in the World Where Rules Are Less Important Than Kindness — Carlo Rovelli (2020)
Source: There Are Places in the World Where Rules Are Less Important Than Kindness · Readwise highlight
Dante left Florence in 1301, while the extraordinary mosaics in the cupola of the Baptistery were being completed.
- Role: subject
- In the book: In “Dante, Einstein and the Three-Sphere”, Rovelli argues that the universe of the Paradiso has the shape of a three-sphere, the same shape as Einstein’s 1917 model. He suggests Dante took the image from the Baptistery: look up and you see a point of light (the lantern window at the apex of the cupola) ringed by the nine orders of angels, each labelled, “exactly as they appear in the Paradiso”. An ant starting on the floor (the South Pole) and climbing any wall would end at that point of light (the North Pole).
- Why it matters: The building’s geometry is the bridge in the argument from medieval imagination to modern cosmology. Without a real interior Dante knew, the claim would be only an analogy.
- Real vs. fictional: Rovelli presents the Baptistery as a likely inspiration (“I believe that Dante may have been inspired by one image in particular”), not as established fact.