Ten years to restore it
York Minster was similar.
You're an old fart, but you're not that old and farty.
ETA: York Minster was a four-year job, although the damage was likely not as severe.
https://www.bbc.co.uk/news/uk-england-york-north-yorkshire-28112373
EETTAA: The Rose Window was cracked into 40,000 pieces. But they put it back together, and now it looks like this:
You're an old fart, but you're not that old and farty.
ETA: York Minster was a four-year job, although the damage was likely not as severe.
https://www.bbc.co.uk/news/uk-england-york-north-yorkshire-28112373
EETTAA: The Rose Window was cracked into 40,000 pieces. But they put it back together, and now it looks like this:
