What term refers to a carved mythical creature used for building decor?

The term "grotesque" specifically refers to a sculptural decoration, often depicting a fantastic creature that combines different animal and human features. This architectural element is frequently found on the exteriors of buildings, particularly in Gothic architecture, where grotesques serve both decorative and functional purposes, such as acting as water spouts to direct rainwater away from walls.

While "chimera" also refers to a mythical creature and can be seen in architectural contexts, it typically indicates a specific type of creature with a more defined mythological basis and isn't used broadly to describe building decor. "Façade" pertains to the front or face of a building and does not specifically denote carved creatures. "Relief" refers to a sculptural technique where the sculpted elements remain attached to a solid background, but it does not specifically imply the use of mythical creatures. The focus on the purpose and design of a grotesque as an architectural detail makes it the most appropriate term in this context.