Searching for Credence, Grindelwald resides at his temporary headquarters in Paris after escaping from MACUSA's prison during his transfer to Europe. This is where Fantastic Beasts: The Crimes of Grindelwald begins.
After his anti-Muggle rally at the Lestrange Family Mausoleum, Grindelwald recruits Queenie and Credence for his revolutionary efforts. Credence's real name, according to Grindelwald, is Aurelius Dumbledore.