The Canopus in Hadrian's Villa, 2003

One of the most striking and best preserved parts of the Villa are a pool and an artificial grotto which were named Canopus and Serapeum, respectively. Canopus was an Egyptian city where a temple (Serapeum) was dedicated to the god Serapis. However, the architecture is Greek influenced (typical in Roman architecture of the High and Late Empire) as seen in the Corinthian columns and the copies of famous Greek statues that surround the pool. One anecdote involves Serapeum and its peculiarly-shaped dome. A prominent architect of the day, Apollodorus of Damascus, dismisses Hadrian's designs, comparing the dome on Serapeum to a "pumpkin". The full quote is "Go away and draw your pumpkins. You know nothing about these [architectural] matters." Once Hadrian became emperor, Apollodorus was exiled and later put to death.

Text from: en.wikipedia.org/wiki/Hadrian's_Villa