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ADVENTUS. - Inscriptions of this kind commemorate the imperial sovereign 's arrival at Rome, either at the commencement of his reign, or on his return from a distance. They also refer to his advent in some city or province of the empire. At their accession to the throne, emperors were not conveyed in a chariot nor in any other vehicle, but went on horseback, and sometimes even on foot; and thus they made their first public entry into the capital of the Roman world. The fact of the equestrian procession of emperors into Rome, even if it were not authenticated from other sources, is abundantly established, by the type of an Imperator eques, accompanying the legend of ADVENTVS AVGVSTI, stamped on so numerous a series of coins. the other custom, viz., that of their arriving on horseback at the gates of the city, and their entering it on foot, is not, and indeed could not, with the same degree of clearness, be elucidated by means of monetal designs; but the fact is described by Dion Cassius, in his account of Septimius Severus ' pedestrian entry into Rome. - That emperors occasionally set out from the city on foot is shown on a large brass of Caracalla, the reverse type of which represents him marching, followed by a soldier. - See PROFECTIO AVG. The Emperor 's departure.
The Adventus legend appears on coins of Nero, Trajan, Hadrian, M. Aurelius, Commodus, Sept. Severus, Caracalla, the Philips, Trebonianus Gallus, Volusianus, Valerianus, Gallienus, Carus, Claudius Gothicus, Tacitus, Probus, Diocletianus, Maximianus Hercules, Carausius, Allectus, Constantine, Jovianus. The types (with the exception of those on Hadrian 's Adventui Augusti) consist generally of the Emperor or Emperors on horseback, with their right hands elevated, sometimes proceeded by a figure of Victory; in other instances, by soldiers bearing standards. These are all on 1st or 2nd brass. There is an Adventus Aug. of Elagabalus in silver; and an Advenyus Augusti of the same Emperor in gold.
Trajan Decius rode horseback, raising a hand and holding his sceptre, on his Adventus antoninianus issue.