Luis Trenker (born Alois Franz Trenker, 4 October 1892 – 12 April 1990) was a South Tyrolean film producer, director, writer, actor, architect, alpinist, and bobsledder. Biography Early life Alois Franz Trenker was born on 4 October 1892 in Urtijëi, Tyrol (, ) in the Austro-Hungarian Empire (in present-day northern Italy). His father Jacob Trenker was a painter from North Tyrol, and his mother Karolina (née Demetz) was from Urtijëi in Val Gardena. He grew up speaking two languages: German, the language of his father, and Ladin, the language of his mother. He attended the local primary school from 1898 to 1901, and then attended the Josefinum in Bolzano in 1902 and 1903. From 1903 to 1905, he attended the arts and crafts school in Bolzano, where he developed his skills as a woodcarver. In 1912, he entered the Realschule in Innsbruck, where he studied Italian as a foreign language. There he began his middle school studies. During his high school years, he spent his holidays working for mountain guides and ski instructors. After his matriculation examinations in 1912, Trenker studied architecture at the Technical University in Vienna. World War I At the start of World War I, Trenker fought as a cadet in an Austro-Hungarian heavy artillery unit on the Eastern Front in Galicia and Russisch-Polen. From 1915 to 1918, he fought in the mountain war against Italy in the border fortress of Nauders. Later he fought in Trento. From 1916 he served as a mountain guide in the Dolomites. At the end of the war he had achieved the rank of Lieutenant. He would write 23 books based on his war experiences, the most important of which were Fort Rocca Alta and Berge in Flammen, the latter of which was made into the 1931 film Mountains on Fire. At the end of the war, Trenker made several unsuccessful attempts to start an architecture business in Bolzano. In 1924 he graduated from the Technical University of Graz, and then worked as an architect in Bolzano, forming a business partnership with the Austrian architect Clemens Holzmeister. In 1924, Trenker participated in the Winter Olympic Games in Chamonix as a member of the Italian five-man bobsled team. Under the leadership of Pilot Lodovico Obexer, they ended up in sixth place. Film career Trenker's first contact with film came in 1921, when he helped director Arnold Fanck on one of his mountain