St. Paul Outside-the-Walls was completed in 1840! Almost yesterday! However, re-consecration and construction continued after that. Interestingly, it seems that an automatic fire-detection and suppression system had been installed in the 19th century.
I looked up the Jubilee Church. Supposedly it has a roof that breaks down NOx. So I asked ChatGPT to do some napkin math and…
Assuming ~1,200 m² of TiO₂-coated surface removing ~16 g NOₓ/m²/year → 1,200 × 16 = 19,200 g = 19.2 kg/year; with an average car emitting ~5 kg NOₓ/year (based on 15,000 km/year at ~0.33 g/km), the roof offsets ~3.8 cars annually.
https://en.wikipedia.org/wiki/Basilica_of_the_National_Shrin... (consecrated 1920; dedicated 1959; minor basilica 1990)
https://en.wikipedia.org/wiki/Cathedral_of_Our_Lady_of_the_A... (1998-2002)
https://en.wikipedia.org/wiki/Main_Cathedral_of_the_Russian_... (2018-2020)
https://en.wikipedia.org/wiki/Holy_Resurrection_Cathedral (Japanese Orthodox; consecrated 1929)
https://en.wikipedia.org/wiki/St._Mary%27s_Cathedral,_Tokyo (1964)
https://en.wikipedia.org/wiki/St._Theresa%27s_Cathedral,_Cha... (2008)
As for Italy? Get a load of this "crown jewel": https://en.wikipedia.org/wiki/Jubilee_Church (2003)