On his return to Vienna he was appointed court painter, professor and vice director of the Academy, and in 1806 director of the Belvedere Gallery.

For more than 50 years, the paintings have been displayed in the Belvedere Gallery in Vienna.

Moll was a founder-member of the Vienna Secession in 1897 and, in 1903 encouraged the use of the Belvedere Gallery to show exhibitions of modern Austrian art.

The most widely known of the paintings is a portrait of Adele Bloch-Bauer, which was commissioned by her husband, Ferdinand, in 1907 and has hung for more than half a century in the Belvedere Gallery in Vienna.

The Austrian government's argument for ownership of the paintings was in large part based on a will by Adele Bloch-Bauer, who died in 1925, in which she asked her husband to leave the works to the Belvedere Gallery after his own death.

His commercial success reached its peak when one of his works was purchased for the Belvedere Gallery in Vienna.

In 1854 he was appointed director of the Prague Academy; in 1865, professor at the Vienna Academy; in 1871, director of the Belvedere Gallery, and in 1874 rector of the Academy.

He also donated one of the paintings to Belvedere Gallery in Vienna in 1936.

A large frieze he painted entitled "Joy, Fair Spark of the Gods", created for the Belvedere Gallery in Vienna, is lost as well.

Was appointed Director of the Belvedere Gallery at Vienna.