Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.
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Step-by-step guidance using the Belgium system — addresses, money services, visit booking, what to bring on your first visit.

From Wikimedia Commons (CC-BY-SA where not otherwise stated).
Photo by Latinista via Wikimedia Commons (CC BY-SA 3.0)
Photo by Tania Dey via Wikimedia Commons (CC BY-SA 3.0)
Photo by Tania Dey via Wikimedia Commons (CC BY-SA 3.0)
Photo by Tania Dey via Wikimedia Commons (CC BY-SA 3.0)
Photo by Jean-Pol GRANDMONT via Wikimedia Commons (CC BY-SA 3.0)
Photo by Jean-Pol GRANDMONT via Wikimedia Commons (CC BY-SA 3.0)
Photo by Giles Laurent via Wikimedia Commons (CC BY-SA 4.0)
Photo by Jean Housen via Wikimedia Commons (CC BY-SA 3.0)
Het Steen is a medieval fortress in the old city centre of Antwerp, Belgium, one of Europe's biggest ports. The surviving structure was built between 1200 and 1225 as a gateway to a larger castle of the Dukes of Brabant which was demolished in the 19th century. As the first stone fortification (city wall) of Antwerp, Het Steen is Antwerp's oldest building and used to be part of its oldest urban centre. The words "Het Steen", translated from Dutch mean "the rock" in English, although that is not the equivalent etymological meaning.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
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Current population
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Occupancy
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Year opened
1200
Operational
Figures from official sources · verified 29 May 2026 · methodology
Operator
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Population held
Mixed/unknown
Opened
1200
Region
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Security level
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Death-row facility
No
No conditions summary available yet.
No visiting information available.
No mailing information available.
Contact the operator's website for inmate-specific procedures.
No major issues documented in our database.
No public contact details available.
Derived signal — not a judgement. How it's calculated
Same country, matched on type + security level where possible.
How many of our profile fields are populated. We surface this so families and researchers know the limits.
Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). Het Steen. Retrieved July 22, 2026, from https://worldprisons.com/prisons/het-steen
"Het Steen." World Prisons. Accessed July 22, 2026. https://worldprisons.com/prisons/het-steen.
@misc{worldprisons-het-steen,
author = {{World Prisons}},
title = {Het Steen},
year = {2026},
url = {https://worldprisons.com/prisons/het-steen},
urldate = {2026-07-22}
}