One Sanctum

One Sanctum
is a sacred space
for all.

Scroll
About One Sanctum

What you've been trying to quiet might be the voice that you and the world need to hear.

You already know something is asking for your attention.

It arrives in the in-between moments: the pause after a conversation that should have felt like enough, the particular quality of 3am, the sense that the life you are living, good as it is, has not yet reached its own depth. Most of us have learned to move past it. To fill the space before it can speak.

We gather in extraordinary places with some of the most important thinkers, healers, and wisdom-keepers of our time. Not to be instructed. Not to be fixed. But to remember — together — what it means to be fully alive, and what becomes possible when people who sense the same things finally find each other in the same room.

This is not the wellness industry. This is something older, and more necessary.

An ancient Greek amphitheatre at night, its curved stone tiers lit from within the pines
Poseidonion Grand Hotel  ·  Spetses, Greece  ·  May 25–29, 2026

Resilience in a Stressed World

Five days on a Greek island with Dr. Gabor Maté and a gathering of remarkable people — exploring what it means to remain whole in a world that rewards fragmentation.

The ancient Greeks knew what we have forgotten — that the circle of togetherness is balm for the soul. Their theatres, their symposia, their mysteries — all were built around this one truth: that healing lives in the space between us, in the gathered presence of others who bear witness.

We have taken the whole house for our gathering. The island of Spetses — car-free, pine-scented, accessible only by sea — creates a natural container. Ordinary life cannot follow you here.

Limited places remaining.

One Sanctum was founded on the belief that

the most important conversations of our time are not happening at scale — they are happening in rooms, between people who have found each other at the right moment. We build those rooms.

One Sanctum is built for those who are ready to stop filling the space — and to find out what has been waiting there. Not the weekend workshop with its crowded schedule and insufficient integration time. Not the online summit that can be consumed passively from a sofa.

A multi-day immersive gathering, away from ordinary life, with a small group of thoughtfully selected participants and a faculty of genuine depth. Each retreat is a progression, not a programme. The intellectual and the somatic interweave. The group itself becomes a resource.

Put the right people together in the right conditions, and something happens that none of them could have produced alone.

Poseidonion Grand Hotel at dusk, Spetses
The Venue

A landmark of the Aegean,
for 110 years.

The Poseidonion Grand Hotel has stood on the Spetses waterfront since 1914 — the vision of Sotirios Anargyros, a benefactor who wanted his island to have a house fit for cosmopolitan life.

The island of Spetses is car-free, pine-scented, and accessible only by sea. Ordinary life cannot follow you here.

We have taken the whole house for our gathering.

In Partnership With

One Sanctum stands for more than personal healing. A portion of all proceeds supports War Child and their mission to save, protect, educate and empower children affected by conflict all over the world.

Partners & Media
OPIS Cosmos Poseidonion ACER Anamnesis Kathimerini Athens Voice
Stay Connected

Be the first to know about
our upcoming gatherings.

News, retreat announcements, and reflections from the work.

We write rarely. We write with care. Unsubscribe any time.