Lady Astrel

ОК, я поискал, и вот первое попавшееся: https://www.pnas.org/content/116/27/13210

Цитирую:

"In this study we show that with two microsamples (<500 μg), from both the canvas and the paint layer itself, a modern forgery could be identified. The canvas dating is consistent with the purported attribution to the 19th century; however, the 14C age gained on the paint contradicts this as it offers clear evidence for a post-1950 creation".

То есть речь практически о современности. Уж точно мы способны отличить полотно XVII века от того, что создано в XIX или недавно.