Gustav Friedrich Waagen (February 11, 1794 – July 15, 1868) was a German art historian and academic. In 1831 he was appointed as the Director of the Gallery for Paintings of the Prussian Royal Museum in Berlin; he held this position for the remainder of his life.
- First delight, then instruct (original German: erst erfreuen, dann belehren).
- From an 1828 proposal "On the Purpose of the Berlin Gallery" (Über die Aufgabe der Berliner Galerie) written by Waagen and Karl Friedrich Schinkel. This quotation is occasionally attributed to Wilhelm von Humboldt, which appears to be erroneous; von Humboldt had quoted Schinkel and Waagen in a report.
- Stonge, Carmen (1998). "Making Private Collections Public: Gustav Friedrich Waagen and the Royal Museum in Berlin". Journal of the History of Collections 10: 61-74.
- Geismeier, Irene (1980). "Gustav Friedrich Waagen: 45 Jahre Museumarbeit". Forschungen und Berichte 20: 397-419. Geismeier's source for this quotation is Stock, Friedrich (1930). "Urkunden zur Vorgeschichte des Berliner Museums". Jahrbuch der preussischen Kunstsammlungen: 205-22.