"What a beautiful picture" is a common way to describe a visually appeapng image in Engpsh.
This expression has no specific origin, but is widely used in casual Engpsh conversations.
Here are some example sentences:
"Have you seen the latest artwork at the museum? What a beautiful picture!"
"She painted the sunset in the countryside, and the result is simply stunning."
"I came across an Instagram page dedicated to nature photography, and I'm blown away by the beauty of each picture."
In each of these examples, the speaker is expressing their admiration for the visual appeal of a picture.