Wandöffnung mit gotischer Rahmung 

"Wandöffnung mit gotischer Rahmung" (Wall Opening with Gothic Framing) is a technical drawing by Karl Ballenberger, a German architect and draughtsman from the 19th century, now housed in the Städel Museum. The drawing details the structure of a Gothic archway, showcasing its complex design and intricate details. Ballenberger's precise lines and annotations highlight the architectural elements, revealing the careful calculation and craftsmanship that went into creating these impressive structures. This drawing provides valuable insights into the construction techniques and aesthetics of Gothic architecture during the 19th century, offering a glimpse into Ballenberger's detailed observations of architectural form.