Horned helmet (Cassis cornuta) is an etching by Wenceslaus Hollar that features a striking depiction of a horned helmet. The artwork showcases the intricate details of the shell, with its unique curves and textures. The background is minimal, allowing the viewer to focus on the helmet itself.

The use of line work emphasizes the form and structure of this fascinating marine creature. This etching is characterized by its fine lines and careful shading, typical of Hollar's technique. The precision in the depiction of the helmet's surface highlights the artist's skill in capturing natural forms. The dimensions of the piece are approximately 25 x 35 cm, making it a relatively small work.

The etching technique allows for a delicate representation of the subject matter. Wenceslaus Hollar was a 17th-century Czech artist known for his detailed etchings and engravings. This particular work, created around the 1650s, reflects the artist's interest in natural history and marine life. Hollar's etchings often served as scientific illustrations, bridging art and science.

An interesting fact about this piece is that it showcases the beauty of a lesser-known marine species, the Cassis cornuta, often overlooked in art.