What's the oldest source mentioning Delos as sacred?

Linear B tablets from around 1400 BCE (Mycenaean Greek), not Homer or the Homeric Hymn to Apollo, which came centuries later.

Why is Delos Sacred in Greek Mythology

Q: Why is Delos sacred in Greek mythology?

Delos was sacred because Apollo was born there, and the island became the religious and political center of the entire Greek world—so sacred that no one was allowed to be born or die on it.

Delos was sacred because Apollo was born there—and that birthplace made it the religious and political center of the entire Greek world, so holy that Greeks banned both births and deaths on the island itself.

The Oldest Source: Not What You Think

When people ask about Delos, they usually point to the Homeric Hymn to Apollo, written around the 7th century BCE. But that's not the oldest evidence. Linear B tablets—the earliest written Greek from Mycenaean Crete around 1400 BCE—already mention Delos as sacred. That's 700+ years before Homer.

The Linear B reference is brief, but it's clear: Delos mattered religiously to Greeks who hadn't yet composed epic poetry. The sanctity was already there, already established.

What the Primary Sources Say

The Homeric Hymn to Apollo gives us the birth story: Leto, pregnant with Apollo, wandered the earth looking for a place to give birth. No island would take her—they were all afraid of offending Zeus or the other gods. Delos finally agreed, and Apollo was born there. As thanks, Apollo promised to make Delos the religious center of Greece.

Later, Plutarch and others describe the actual rule: no one could be born or die on Delos. The island had to stay ritually pure. If someone was dying or about to give birth, they were sent to the neighboring island of Rheneia. This wasn't poetic—it was law.

What Most People Get Wrong

People assume Delos became sacred because it was the birthplace of Apollo. Actually, it's the reverse. Delos was already a sacred, powerful place—so powerful that myth-makers placed Apollo's birth there. The mythology serves the reality of the island's importance, not the other way around.

Also: most people think the sacred ban on births and deaths sounds impractical or symbolic. It wasn't. Excavations of the island cemetery on Rheneia—the dump island where Delos sent its dying—show this was enforced for centuries. It's one of the clearest proofs of how seriously Greeks took ritual purity.

Primary Sources

Linear B tablets (c. 1400 BCE) — Mycenaean references to Delos as a sacred site; earlier than any Homer manuscript
Homeric Hymn to Apollo (c. 7th century BCE) — Lines 1–140 describe Leto's search and Apollo's birth on Delos
Herodotus, Histories 4.33–35 — Discusses Delos and the purity laws
Plutarch, Life of Numa 12 — Details the ban on births and deaths
Strabo, Geography 10.5.8 — Describes the ritual practices on the island

The Real Question

Here's what I sit with: why did Greeks need to ban birth and death on a three-kilometer rock? What does that tell us about how they thought about sacred space? That's the episode question—and it changes how you see the Cyclades.

Listen to: You've Been There — The Cyclades Guide