The image is a photograph of a construction site with a sign that reads "Wolf & Müller" in German. The sign is attached to a metal fence and is located in front of a building under construction. The building appears to be under construction, as there are scaffolding and other construction materials visible in the background.

The sign is white with black text and yellow warning signs. The signs are arranged in a grid-like pattern, with each sign pointing in a different direction. The first sign is a yellow triangle with a red exclamation mark, followed by a blue circle with a white exclamation point, and the second sign is an orange triangle with an exclamation symbol. The third sign is blue and white, with a yellow circle in the center. The fourth sign is yellow and black, with the words "Notruf 112" written in German, which translates to "Warning" in English.