Claire Beck Loos (November 4, 1904 – January 15, 1942*) was a Czechoslovakian photographer and writer. She was the third wife of early modernist Czechoslovak-Austrian architect Adolf Loos. She worked in the atelier of Hede Pollak in Prague and studied photography in Vienna at the Graphische Lehr- und Versuchsanstalt. In 1936, she published Adolf Loos Privat, a literary work of anecdotes about her ex-husband's character, habits, and sayings. Published by the Johannes-Presse in Vienna, the book was intended to raise funds for Adolf Loos's tomb, as he had died destitute three years earlier. She moved to Prague at the beginning of World War II and was deported to Theresienstadt at the end of 1941 and from there to Riga, Latvia, where she was killed in the Holocaust. *Her death date is thus only an estimate.

• Editor’s Introductory NotesPreface: Reflections of a Female ProtegeAdolf Loos: A Short BiographyClaire Beck Loos: The Fractured LensIntroduction to The Private Adolf LoosForeword by Claire Beck LoosThe Private Adolf LoosAppendicesAdolf Loos’ Circle, Some ContextKey to NamesErrataLove Letters from Adolf Loos to Claire BeckPhotographsSelect Writings By Adolf LoosPotteryIn Praise of the PresentBeethoven’s EarsOrnament and EducationShort Hair: Short or Long—Masculine or Feminine? Oskar KokoschkaAcknowledgments

What makes the book most valuable is the fine-grained portrait it provides us of Loos’ last years, of his activities and his preoccupations. […] The English translation of her book, made by Constance C. Pontasch [and Nicholas Saunders], is fluent and accurate, conveying well the tone of Claire Loos’ original (which, in turn, to some extent mimics Loos’ own writing style). [...] It is a richly informative, if sad, tale, and, in Claire’s telling, undoubtedly a very largely truthful one. —Christopher Long, West 86th: A Journal of Decorative Arts, Design History, and Material Culture