late antiquity

Short definition from Wiktionary

Proper noun

1. 1
   Alternative letter-case form of Late Antiquity.
2. 2
   The period of Mediterranean and Eurasian history from around the 3rd to the 7th centuries CE, marked especially by the transition from the Roman and Persian Empires to the Middle Ages and the Islamic and Byzantine civilizations.
3. 3
   Misspelling of Late Antiquity.