Katie Holten is a visual artist based in New York City. She grew up in rural Ireland and studied fine art and history of art at the National College of Art and Design in Dublin and the Hochschule der Kunst in Berlin. In 2003, she represented Ireland at the 50th Venice Biennale. In 2015, she created a Tree Alphabet and used it to make the book About Trees. She also created a Living Tree Alphabet for New York City.