Ferdinand Hodler (1853-1918) is arguably the foremost Swiss artist of the late 19th and early 20th centuries. Ignoring artistic conventions of his time he created a vast oeuvre comprising landscapes and portraits, monumental historic scenes and symbolic and allegorical figures, and also drawings and sketches. A number of recent international publications and exhibitions as well as rising prices for his works at auction indicate that Hodler today has secured his place as an important figure in art history. Although Hodler's work has been widely published in recent years, a catalogue raisonne of his work has been lacking. This gap is being closed now by the Swiss Institute for Art Reasearch (SIK-ISEA) in Zurich. The result of years of scholarly work is going to be published in four parts until 2016. The new volume 2 documents Hodler's oeuvre in portraiture and includes all known works. It presents also all works where attribution to Hodler is questioned by recent research, works where attribution has been proven wrong or that are proven forgeries.