Ancient Greek Pronunciation

By Grok, xAI

Query: Is there evidence for the claim that Ancient Greek had no accents (or even lower case letters)?

  Yes, there is strong historical, epigraphic, and paleographic evidence supporting the claim.

Accents (Diacritics)
  The original Greek alphabet, attested from the 8th century BC, had no diacritics of any kind (no accents, no breathing marks, no iota subscript, etc.). Inscriptions and texts from the Archaic and Classical periods (roughly 8th–4th centuries BC) were written without them. en.wikipedia.org
  The system of accents (acute ´, grave `, circumflex ῀) and breathings (rough ῾ and smooth ᾿) was invented during the Hellenistic period by scholars in Alexandria, notably Aristophanes of Byzantium (head of the Library of Alexandria, active early 2nd century BC, with work building on 3rd-century developments). These marks were created to:
  Preserve and teach the correct pitch-based pronunciation of older literary texts (especially Homer and poetry).
  Help non-native speakers and students as spoken Greek pronunciation began to shift.
  Distinguish homophones in continuous script (ancient Greek was typically written without word spaces or punctuation). en.wikipedia.org

Key timeline for accents:
  Classical period (5th–4th centuries BC): Not indicated in writing at all.
  Hellenistic period onward (from ~2nd century BC): Invented and used sporadically (mainly in scholarly or educational contexts).
  2nd century AD: First sporadic appearances in papyri.
  After ~600 AD/Middle Ages (Byzantine period): Became standard in manuscripts. en.wikipedia.org
  Early papyri and inscriptions generally lack them; the marks were scholarly additions, not part of everyday ancient writing practice.

Lowercase Letters
  Ancient Greek had only a single set of letter forms—what we would call uppercase or majuscule (capital) letters. There was no distinction between uppercase and lowercase as in modern typography. All formal writing (inscriptions on stone, early manuscripts) used these capital-like forms. en.wikipedia.org

Key timeline for script development:
  Antiquity (through the early centuries AD): Majuscule/uncial scripts dominated (rounded capital forms suitable for parchment or papyrus). Informal cursive hands existed for everyday documents, but these were not standardized "lowercase" letters.
  9th century AD (Byzantine period): The Greek minuscule script (the basis of modern lowercase Greek letters) developed, largely from cursive styles. It became the standard book hand, notably advanced at monasteries like Stoudios in Constantinople. This replaced uncial for most literary manuscripts.
  Renaissance onward: Printers adopted minuscule forms as lowercase type, modeling uppercase on ancient inscriptional capitals. en.wikipedia.org
  In short, what we recognize today as "lowercase Greek" (α, β, γ, etc.) is a medieval innovation, not used in ancient times.

Overall Assessment
  The claim is well-supported by:
  Surviving ancient inscriptions (e.g., from the Athenian Agora or classical sites)—all capitals, no accents.
  Early papyri (pre-Hellenistic or early Hellenistic) lacking diacritics.
  The established history of Greek paleography and epigraphy.
  Scholarly consensus in linguistics and classics (e.g., accounts crediting Alexandrian grammarians for accents and Byzantine scribes for minuscule).

Nuance:
  Accents were added during the Hellenistic era (still part of "ancient Greek" history in a broad sense), but they were not original to the alphabet or classical writing. Lowercase letters came centuries later in the medieval/Byzantine period. Modern editions of ancient Greek texts add both for readability and scholarly convention—they were not present in the originals as written by ancient authors or scribes. This is standard knowledge in Greek paleography and historical linguistics.