411 REFERENCE · Wiktionary
Decennalia
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
* s
en decennalia.
1915, Arthur Evans, "Notes on the Coinage and Silver Currency in Roman Britain from Valentinian I to Constantine III", Numismatic Chronicle..., 4th Ser., Vol. 15, p. 436:
Seven pieces celebrate the Decennalia of Arcadius, which were due on Jan. 15, 393.