Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Caspar David Friedrich:

"

By this time his reputation and fame had waned, and his passing was little noticed within the artistic community.[1] His artwork had certainly been acknowledged during his lifetime, but not widely. While the close study of landscape and an emphasis on the spiritual elements of nature were commonplace in contemporary art, his interpretations were highly original and personal.[2] By 1838, his work no longer sold or received attention from critics; the Romantic movement had moved away from the early idealism that the artist had helped found.[citation needed]