The first known settlements are from the 13th century. After 1300 Arosa German-speaking Walser settlers came from Davos and replaced the original Romansh-speaking inhabitants. During the following centuries, the village had a subsistence alpine pasture economy. Until 1851 it was politically a part of the Davos municipality. Arosa was established as a health resort by a German doctor in 1883, and the first sanatorium was opened in 1888. From 1900 on it gradually developed as a winter resort. In 1938 the first ski lifts were built, and in 1956 the Weisshorn cable car was opened and further rope and chair lifts followed.