The Palatine Hill's Ara Calvini, dedicated to "sei deo sei deivae," is popularly called an altar to a god described by this adjective. For 10 points each:
[10m] Give this adjective usually used to describe a deity about whom the Apostle Paul preaches at the Areopagus (AIR-ee-OP-ug-giss) after seeing an altar to this kind of deity.
ANSWER: unknown [or ignotus; or agnostos; or Ara Dei Ignoti; or Unknown God; or Agnostos Theos]
[10h] Per Plutarch, an "unknown god" ordered the theft of this deity's cult statue from Sinope in a dream, after which his cult was promoted by Timotheus and Manetho. The decline of Hellenistic paganism is often dated to the destruction of a temple to this syncretic deity where Hypatia was killed.
ANSWER: Serapis [or Sarapis; or serapeum or serapeion; or Serapion of Alexandria]
[10e] The unknown god Aius Locatius, who warned Rome of Gallic invaders, is discussed in this augur's dialogue On Divination. This author of On the Nature of the Gods also delivered the Catiline Orations.
ANSWER: Marcus Tullius Cicero [or Tully]
<Clark Smith , Mythology - Greco/Roman>