Alma Mahler
Moll was born in Vienna, Austria. He studied art at the Academy of Fine Arts Vienna. He was a student of Christian Griepenkerl and of Emil Jakob Schindler (the father of Alma Mahler-Werfel "née" Schindler). After his teacher's 1892 death, Moll married Schindler's widow, Anna ("née" von Bergen); they had been lovers for some time.