Polygonal column 

This architectural drawing by Karl Ballenberger, a 19th-century German artist, depicts a polygonal column in a room. It features detailed line work, highlighting the intricate details of the column’s shape and base. The column's design, including its polygonal form, is a striking example of classical architectural principles. The drawing, likely created as a study of architectural elements, showcases Ballenberger’s precise observation and masterful rendering skills. The artwork is currently housed at the Städel Museum, providing valuable insight into the architectural styles prevalent in the 19th century.