Lüen is a former municipality in the district of Plessur in the canton of Graubünden in Switzerland. On 1 January 2013 the former municipalities of Lüen, Calfreisen, Castiel, Langwies, Molinis, Peist and St. Peter-Pagig merged into the municipality of Arosa. History Lüen is first mentioned in 1084 as Leune. Geography Before the merger, Lüen had a total area of . Of this area, 37% is used for agricultural purposes, while 52.3% is forested. Of the rest of the land, 1.4% is settled (buildings or roads) and the remainder (9.2%) is non-productive (rivers, glaciers or mountains). The former municipality is located in the Schanfigg sub-district of the Plessur district. It consists of the haufendorf village (an irregular, unplanned and quite closely packed village, built around a central square) of Lüen on the north face of the mid-Schanfigg. In Lüen is the Lüen-Castiel railway station, on the Chur-Arosa railway line, which also serves Castiel. Demographics Lüen had a population (as of 2010) of 84. , 10.6% of the population was made up of foreign nationals. Over the last 10 years the population has decreased at a rate of -15.6%. Most of the population () speaks German (91.9%), with English being second most common ( 4.1%) and Dutch being third ( 2.7%). , the gender distribution of the population was 49.4% male and 50.6% female. The age distribution, , in Lüen is; 8 children or 10.8% of the population are between 0 and 9 years old and 11 teenagers or 14.9% are between 10 and 19. Of the adult population, 1 person is between 20 and 29 years old. 14 people or 18.9% are between 30 and 39, 14 people or 18.9% are between 40 and 49, and 4 people or 5.4% are between 50 and 59. The senior population distribution is 14 people or 18.9% of the population are between 60 and 69 years old, 6 people or 8.1% are between 70 and 79, there are 2 people or 2.7% who are between 80 and 89. In the 2007 federal election the most popular party was the SVP which received 69.4% of the vote. The next three most popular parties were the SP (19%), the FDP (8.8%) and the CVP (2.7%). In Lüen about 70% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule). Lüen has an unemployment rate