Mogontiăcum, Moguntiăcum
or
Magontiăcum. The modern Mainz or Mayence; a town on the
left bank of the Rhine, opposite the mouth of the river Moenus (Main). It lay within the
territories of the Vangiones, and finally became the capital of Germania Prima. (See
Germania.) It was strongly fortified by Drusus, and
until the downfall of the Roman Empire remained one of the chief of the Rhenish fortresses
(
Hist. iv. 15, 24; Amm. Marc. xv. 11).