View all 3 photosThe Matter
The Matter in Culemborg, Netherlands with public Psilocybin listing details. Use this dossier to verify legal context, people, logistics, consent, emergency planning, and integration before contact.
Legal context in Netherlands
Most careful visible legal context: knowledge only. Verify current local rules before travel or contact.
How to contact
Pause before outreach. Treat this as a research lead, not a recommendation, until the gaps below are answered.
Shamans & Facilitators
Learn about the people who will be holding space.
Marieke van der Spek
Marieke has fully focused on personal development, leadership and how psychedelics can support this. She has 20 years of work experience at various large organizations in positions where cooperation and personal development were central. Marieke is a certified coach, trainer and psychedelic practitioner. She applies her knowledge and experience to facilitate others in their personal growth. She connects with people, provides peace and is able to show ways to explore breaking old patterns and creating new possibilities. "In my work as a coach, I noticed that that fixed thinking and behavior patterns make it dif...
Verify roleEric van der Hoeff
Eric has worked successfully as an entrepreneur in fruit cultivation for 30 years. He built, together with 3 partners, an international cultivation consultancy for fruit growers. This company grew into a respected and leading company in the sector. Working with and in nature, the trees, the soil and his customers gave him a lot of satisfaction. After 30 years of very hard work, with success, he has very consciously chosen a different direction. “After years of hard working and multiple experiences with psychedelics, I have very consciously chosen a different direction. For me, plant medicines are a special par...
Verify rolePractical Logistics
Details to help you plan your questions, not to replace direct confirmation.
Getting there
Ask which airport, pickup point, road time, and arrival window are expected.
Road & duration
July 30 - August 2, 2026, June 18 - 21, 2026
What's included
Private rooms available, Vegan, Vegetarian
What's not included
Listed from $2,067.00. Ask about flights, insurance, private sessions, and extra transport.
Integration & Aftercare
Slow down here. Good centers should explain support before and after ceremony.
- Verified pre-retreat intake screening: Includes an individual online intake session before the retreat
- Verified integration support after the retreat: Includes an online integration session after the retreat (and follow-up integration group call mentioned)
Verified Matching Details
Public facts that can help you compare fit before contact.
- Medicine form described
- Verified medicine form described: Describes the retreat as working with psilocybin truffles (not magic mushrooms)
- Substance or medicine
- Verified substance or medicine: Psilocybin
- Pre-retreat intake screening
- Verified pre-retreat intake screening: Includes an individual online intake session before the retreat
- Integration support after the retreat
- Verified integration support after the retreat: Includes an online integration session after the retreat (and follow-up integration group call mentioned)
- Group size
- Verified group size: Group size: 8 persons
- Group size
- Group size reported up to 8.
- Group size
- Group size reported up to 8.
- Starting price
- Starting price reported as $2,067.00.
Listed Retreats & Ceremonies
Use these as public listing leads to verify directly.
- Summer Psilocybin Retreat - 30 July - 2 AugKnowledge only
- Location
- Culemborg, Netherlands
- Dates
- July 30 - August 2, 2026
- Price
- $2,067.00
- Group size
- 8 listed
- Reviews
- 5.0 rating · 1 review listed
- Meals
- 3
- Accommodation
- Private rooms available
- Transport
- Not listed yet
- Summer Solstice Psilocybin Retreat - 18-21 JuneKnowledge only
- Location
- Culemborg, Netherlands
- Dates
- June 18 - 21, 2026
- Price
- $2,067.00
- Group size
- 8 listed
- Reviews
- 5.0 rating · 1 review listed
- Meals
- 3
- Accommodation
- Private rooms available
- Transport
- Not listed yet