Here are a couple of double exposures taken in the summer of 2023 in Berlin - with 35mm focal length and a Black Pro Mist filter in front of the lens.
Schloss Charlottenburg, Berlinische Galerie, Buchstabenmuseum, Deutsche Kinemathek, Urban Nation, Gropius Bau, Hamburger Bahnhof, Ephraim Palais, Deutsches Historisches Museum, Humboldt Forum, Hackesche Höfe, Illusionen-Museum.