[ceejayoz]

The idea would be to turn what was previously the "attic" of the church into a public, park-like space.

https://www.cnn.com/style/article/france-notre-dame-green-sc...

[cc439]

That would simply create a gigantic greenhouse that would require enormous energy inputs to keep it habitable during most of the year. Not the most eco-friendly solution.

[ceejayoz]

There's certainly precedent.

https://en.wikipedia.org/wiki/Louvre_Pyramid

[seszett]

It would be on the small side for greenhouses. It could also very well be unheated in the winter, it's just Paris and not Vladivostok.

[throw0101a]

There are films that can be applied to glass that block infrared light, which would reduce thermal heating.