Grand Est: how this area actually works
Strasbourg is the regional capital, and its maison d'arrêt is a city-edge house, not the European Parliament and not the German consulate. Metz and Nancy split Lorraine's court traffic. Reims anchors the Champagne side, which used to be a different région and is now the western end of this URL. Mulhouse and Colmar sit on the Rhine, facing Baden-Württemberg. Ensisheim, in Haut-Rhin, is a known centre de détention and not the Strasbourg local. Saint-Mihiel appears in Lorraine searches as another sentenced site. German plates at the car park do not convert any of these into a JVA.
A person held in Grand Est is under French rules: permis de visite, and often the juge d'instruction if they are still prévenu. Baden-Württemberg's Justizvollzug, Saarland's desk and Luxembourg's system do not see the file. GENESIS is internal to the French ministry. Cross-border workers from Kehl or Saarbrücken still need the French permit. The DAP can move someone from Strasbourg to Ensisheim, to Metz, or out to Île-de-France. The Rhine is not a prison boundary you can ignore in either direction. Mulhouse and Colmar face Baden-Wurttemberg and still use French permits.
This page groups prisons recorded as Grand Est. It does not list people in Strasbourg, Metz, Nancy or Ensisheim. Read justice.gouv.fr and the établissement notice. Do not bring a Stammheim or Saarbrücken routine to a French parloir. Do not assume Reims is still administratively 'somewhere near Paris' for custody. It is this région. Strasbourg, Metz, Nancy, Reims and Ensisheim are five addresses. The European Parliament is not one of them. Mulhouse and Colmar are Rhine towns with their own notices, not the Strasbourg tram. Reims is Champagne, not Alsace. Yes.
Finding someone held in Grand Est
Grand Est publishes no roll of people in Strasbourg, Metz, Nancy, Reims or Ensisheim. Ask the French lawyer or the greffe. justice.gouv.fr is the family route. GENESIS is not public, and German Auskunft is the wrong country. A remand in Strasbourg may still be in police custody. Do not phone the maison and expect a name. A Kehl rumour is not a placement. The Strasbourg maison will not read a roll to a caller from across the Rhine. Wait for the French reply.
Strasbourg is not Ensisheim, and Metz is not Nancy. Mulhouse is not Colmar's court steps. If the letter names a JVA in Baden-Württemberg or Saarland, switch country and procedure. A French permis names one établissement. It will not be honoured at a German gate, and a German Besuchserlaubnis will not be honoured here. Ensisheim is not Strasbourg, and Reims is not Metz. Nancy is a third Lorraine address, and Mulhouse is not Colmar. Nancy is not Metz. Keep them apart.
Visits and family practicalities
The permis de visite is French, house by house. Remand can require the juge d'instruction in Strasbourg, Metz or Nancy. This guide does not invent hours. Read the notice before you cross the Rhine or take the TGV Est.
Bring the identification the établissement listed. A German identity card is useful only if it is the document they accept, not because you drove from Kehl. Phones stay outside. If the person moved to Reims or to Paris, the Strasbourg permit fails. Re-check before you park.
Getting around Grand Est
TGV Est, Strasbourg Airport and EuroAirport Basel-Mulhouse cover different corners. Metz and Nancy are a TER relationship, not one station. Ensisheim is a Haut-Rhin road from Mulhouse or Colmar, not the Strasbourg tram to the European quarter. Reims is the western TGV stop, easy to overshoot toward Paris.
Drivers from Baden-Württemberg and Saarland should leave border time and the French last mile separate. Parking at city maisons is tight. Use the French address. Do not finish at the Landtag in Stuttgart or at the Council of Europe and call it a visit.