It is the omphalos, this city that straddles two steamboat rivers at the continental crossroads.
Among the former is the famous omphalos or Navel-stone, on which Apollo is often represented as sitting.
From which omphalos or hub of the universe he will direct his shining team even to the far Hesperides of Richmond or of Windsor.
On the right, the god is seated on the omphalos, holding up his right hand.
Delphi also contained the “omphalos,” a sacred stone bound with fillets, supposed to mark the centre of the earth.
omphalos, om′fal-us, n. the navel: a raised central point: a boss.
also omphalus, "sacred stone," 1850, from Greek omphalos, literally "navel," later also "hub" (as the central point), from PIE *ombh-alo-, from root *nobh-/*ombh- "navel" (see navel). The name of the rounded stone in the shrine at Delphi, regarded by the ancients as the center of the world. Related: Omphalic.
omphalos om·pha·los (ŏm'fə-lŏs', -ləs)
n. pl. om·pha·li (-lī')