Basileios Stoa (Greek: βασίλειος στοά), also Basilike Stoa (Greek: βασιλική στοά), both meaning Royal Stoa, was a stoa constructed in Ancient Athens in the 5th century BC. It was located in the northwest corner (known as "the Herms" because of the great number of Herms set up there) of the Athenian Agora.