Generally spoken it’s a room of app. 12 sqm where you’re locked up for -in the worst case- 23 hours a day and your family is allowed to visit you thrice a month for 45 minutes…in Germany that is.
They’re not giving away details about his physical state…just that -at this time- imprisonment would be disproportional for a 91-year-old stateless person who supposedly has no opportunity to leave the country in the first place.