Watercolour paintings and drawings by Adolf Hitler from about 100 years ago are to go up for auction in southern Germany this month, an auction house said Tuesday.

Some of the works, which date from 1904 to 1922, are signed A. Hitler, the catalogue of Nuremberg-based Weidler auctioneers showed on its website.

The 14 watercolours and drawings are expected to go under the hammer between June 18 and 20 for between 1,000 euros and 45,000 euros ($1,128-50,700) each.

The most expensive is a painting of King Ludwig II's Neuschwanstein Castle in Bavaria, now a tourist magnet.

In November a watercolour painted by a young Hitler in 1914 of the city hall in Munich sold for 130,000 euros at a sale organised by the same auction house.

The buyer wished to remain anonymous.

As a budding young artist, Hitler applied to the Vienna Academy of Art but was rejected. He continued to paint however, copying images from postcards that he sold to tourists.

Experts consider his work to be of mediocre quality.