After 1920, until his death, he exhibited his paintings and woodcuts widely throughout Switzerland and Germany. In 1925, he married the wealthy Ada van Blommestein, from the Netherlands, and travelled with her there. They had one son. Although he was now financially secure, his health began to deteriorate, so he returned to Davos and died there in 1933, while having an operation for gastric cancer. Ada took his remaining works to Baarn, in the Netherlands, and hid them from the Nazis. In Germany, his paintings were declared "degenerate art" and some were displayed at the Degenerate Art Exhibition in Munich in 1937. Most of his work there was eventually destroyed or lost. It wasn't until 1960 that his works were rediscovered and reevaluated.