This is part of my “paintings which look interesting to Julian” series, which is based on absolutely no artistic ability on my behalf. This painting is by Caspar David Friedrich, who according to Wikipedia (and of course therefore this must be entirely true) is “generally considered the most important German artist of his generation”. The German Post Office used his work on one of his stamps, an honour he’d have no doubt been thrilled with if he had been alive to see it.
Friedrich lived from 1774 until 1840, with this artwork of a ploughed field having been painted in around 1830. Unfortunately, I can’t find out anything more interesting about this particular painting, other than the Kunsthalle obtained it in 1905.