bk: I had assumed that the Bruno Cremer Maigret series was filmed in France but I spotted this on the Maigret forum;
The scenes which are supposed to take place in the streets of Paris were filmed in Prague. Because of budget issues, but also because Paris has changed so much since the 1950s, in which most of the action of the series is set, they preferred the Czech capital, where certain streets more or less resemble Paris. For the scenes set outside of Paris, they were mostly filmed in the Czech Republic. Some episodes were filmed elsewhere:
Finland for Maigret et le fantôme, Maigret en Finlande.
Belgium for Maigret chez les Flamands, Les Vacances de Maigret, Maigret et l'inspecteur Cadavre, Les Scrupules de Maigret, Maigret et la Croqueuse de Diamants.
France for La Maison du Juge, Maigret a Peur, Maigret et le Fou de Ste-Clothilde, Maigret et l'affaire Saint-Fiacre.
Luxembourg for La nuit du Carrefour, Maigret et le Fou de Ste-Clothilde.
Switzerland for the luxury hotels in Les caves du Majestic.
Ireland for Le Port des Brumes.
South Africa for Maigret et le Liberty Bar.
Portugal for Maigret et l'improbable M. Owen, Mon ami Maigret.
Cuba for Maigret et les Petits Cochons Sans Queue.