"Franz Sigrist the Elder: An Oeuvre of Painted Oil Sketches" is an academic dissertation in the field of art history, covering a baroque oil sketch artist. A significant portion of Franz Sigrist’s well-known work consists of painted oil sketches. They not only represent the foundation of his artistic process, but reveal Sigrist’s personalized style and his dynamic and creative method of design. Examples of his work analyzed in this paper reveal that an oil sketch could signify the beginning of a working process, be used to further develop a subject or even be sold as collector’s items. For example, his illustrations of The Healing of Tobit were made for Viennese Academy of Arts‘ annual competition in 1753.