Druidic Astrology

The Druidic system as it exists today is not a direct transmission from ancient Celtic priests (the Druids left no written texts due to an ethical prohibition on recording sacred knowledge), but a reconstruction created primarily in the 18th–20th centuries.

Graves's "White Goddess". Robert Graves in "The White Goddess" (1948) proposed the "Tree Alphabet" system, linking thirteen months of the lunar year to thirteen trees and letters of the Ogham script. This schema became the foundation of modern neo-Druidic and Celtic pagan practices, though its historical accuracy is disputed by Celtic studies scholars.

A Lunar Calendar of 13 Months

Each month is associated with a specific tree:

• Birch (December–January) — beginnings, purity, rebirth
• Rowan (January–February) — protection, intuition
• Ash (February–March) — connection between worlds, the maritime principle
• ...and so on through reed, elder, and mistletoe

The birth tree. Describes fundamental character, capacity for growth, and connection to natural forces.

The Ogham Script

A real historical system. Ogham is a real historical writing system, attested in Irish inscriptions from the 4th–10th centuries and in numerous medieval manuscripts.

20 symbols = 20 trees. Each of the twenty Ogham symbols corresponds to a tree and a sound.

Divinatory use. In modern practice, Ogham is used as a divination system — symbols carved on wooden staves are cast or drawn in a manner analogous to Norse runes (#21).

Place in Errarium

The Celtic branch of nature traditions. In Errarium, the Druidic system represents the Celtic branch of nature-based symbolic traditions.

Analogs. The closest analogues are:

• Runes (#21) — by mechanism of working with natural archetypes and an alphabetic system
• Tibetan astrology (#39) and Nine Star Ki (#40) — by the principle of linking time of birth to a patron natural element