Gothic crab 

"Gothic crab" is a pencil drawing by Karl Ballenberger, a German artist active in the first half of the 19th century. The drawing, currently housed in the Städel Museum, depicts an intricate, abstract design resembling a stylized crab shell, characteristic of the Gothic style. Ballenberger's attention to detail is evident in the delicate shading and the meticulous rendering of the curved lines, which create a sense of depth and texture. This drawing is a testament to Ballenberger's skill and his appreciation for the aesthetic qualities of Gothic architecture and ornamentation.