 He was known for his wide breadth of stylistic exploration, informed through his early exposure to the Art Nouveau, Constructivist, Synthetic, and Non-objective art movements in Eastern Europe.While living in Paris, he was greatly influenced by Post-Impressionism, Fauvism, Cubism, and Primitivism.Lahner's close friends included artists and writers Jean Bouret, Léopold Sédar Senghor, Jean Trichet, Marcel Sauvage, and André Masson.