The Temple of Apollo Patroos (meaning "of the fathers") is a small ruined temple on the west side of the Ancient Agora of Athens. The original temple was an apsidal structure, built in the mid-sixth century BC and destroyed in 480/79 BC. The area probably remained sacred to Apollo. A new hexastyle ionic temple was built ca. 306-300 BC, which has an unusual L-shaped floor plan. Some fragments from the sculptural decoration of this structure survive. The colossal cult statue, by Euphranor, has also been recovered.
Next to the temple was a tiny shrine, built around the mid-fourth century BC. identified as the Temple of Zeus Phratrios and Athena Phratria; it may originally have been built to house Euphranor's cult statue.