Kar(e)l Faustin Klostermann (February 13, 1848, in Haag am Hausruck, Upper Austria, Austrian Empire – July 17, 1923, in Šteken, Czechoslovakia) was a Czech and Austrian writer.
He wrote under the alias Faustin.
From 1857 to 1865 he went to school in PÃsek, a town in the South Bohemian Region of what is now the Czech Republic.
He studied medicine until 1869 in Vienna, and was later active as a teacher of German and French at the German high school in Plzen.
He first wrote his works in German; later he turned to the Czech language and wrote novellas about the inhabitants of the middle Bohemian Forest (Czech: Šumava, German: Böhmerwald).
This can be found in the collection V srdci šumavských hvozdu ("In the heart of the Šumava").