Introíbo ad altáre Dei — an API-first platform for the traditional Catholic liturgy.
Directorium is an open, authoritative, and independently-verifiable resource for the traditional Roman liturgy — the calendar, the Missal, the Breviary, and a side-by-side comparison of how the rite has changed across editions. It is built to be accurate to the printed books, transparent about its sources, and rich in options: multiple rubric editions, regional and religious-order calendars, and (on the horizon) other rites.
| Repo | What it is | Licence |
|---|---|---|
| Core | The clean-room PHP engine: computes the calendar, resolves each day, and generates the corpus. | AGPL-3.0-or-later |
| Api | The cache-first /v1 HTTP service over the engine. |
AGPL-3.0-or-later |
| Site | The directorium.app website and admin. | AGPL-3.0-or-later |
| Ordo | The WordPress plugin (bundles Core). | GPL-2.0-or-later |
The compiled calendar dataset is released under CC0 — free for anyone to use.
- Accurate to the books. Every feast, rank, colour, and text cites the authoritative printed edition it comes from, and the engine is cross-checked day-by-day against independent oracles.
- Clean-room. The engine is written from published rubrics and liturgical fact — never ported from another project's code, and never by transcribing copyrighted texts.
- Transparent. We publish our sources, our errata, and why each day resolves the way it does.
- Diverse. Options are the point: many editions, many calendars, eventually many rites.
See CONTRIBUTING. Contributions are
accepted under the Developer Certificate of Origin (sign off with git commit -s) and a
clean-room / provenance attestation. Corrections to liturgical data are especially welcome — please
include the printed citation that supports the fix.