  Hegel’s published thoughts on aesthetics are to be found in pars. 556–63 of the 1830 Encyclopaedia. Hegel also held lectures on aesthetics in Heidelberg in 1818 and in Berlin in 1820/21 (winter semester), 1823 and 1826 (summer semesters), and 1828/29 (winter semester). Transcripts of Hegel’s lectures made by his students in 1820/21, 1823, 1826 and 1828/29 have now been published (though so far only the 1823 lectures have been translated into English) (see Bibliography). In 1835 (and then again in 1842) one of Hegel’s students, Heinrich Gustav Hotho, published an edition of Hegel’s lectures on aesthetics based on a manuscript of Hegel’s (now lost) and a series of lecture transcripts. This is available in English as: G.W.F. Hegel, Aesthetics. Lectures on Fine Art, trans. T.M. Knox, 2 vols. (Oxford: Clarendon Press, 1975). Most of the secondary literature on Hegel’s aesthetics (in English and German) makes reference to Hotho’s edition. Yet according to one of the leading specialists on Hegel’s aesthetics, Annemarie Gethmann-Siefert, Hotho distorted Hegel’s thought in various ways: he gave Hegel’s account of art a much stricter systematic structure than Hegel himself had given it, and he supplemented Hegel’s account with material of his own (PKÄ, xiii–xv). Gethmann-Siefert argues, therefore, that we should not rely on Hotho’s edition for our understanding of Hegel’s aesthetics, but should instead base our interpretation on the available lecture transcripts.