 The Lucerne gallery continued to be under Justin's direction until 1928, when his cousin Siegfried Rosengart assumed control and changed its name to Galerie Rosengart.Over the years, Heinrich and Justin Thannhauser purchased, traded or had on consignment 107 works by Van Gogh or attributed to him.In 2017, the Van Gogh Museum in Amsterdam published the catalogue "The Thannhauser Gallery