Alois Riegl (1858-1905) is one of the most well-known representatives of the so-called 'Vienna School of Art History', and he belongs to those art historians whose literary production has exerted a long-lasting influence on the developments of the art-historical discipline.· 2 He wrote influential works on historical-artistic periods which had until then been marginalised or ignored, as in the case of the Late Antiquity and the Baroque, as well as on neglected historical-artistic genres like the applied arts, which Art Historiography had considered hierarchically subordinate.The collation of these posthumous books with the voluminous corpus of Riegl's manuscripts on Baroque art, which are preserved in the archives of the Department of Art History at the University of Vienna, sheds light on the fact that both Burda and Dvofák, and Swoboda and Wilde decided to publish only a small part of Riegl's manuscripts. Andrew James Hopkins, Arnold Witte, and Alina Payne, the authors of The Origins of Baroque Art in Rome (2010) - the first English translation of the posthumous publication Die Entstehung (1908) - were the first to problematise the discrepancies between Riegl's posthumous publications on the origins of Baroque art and the entire manuscript corpus. This book offers not only an in-depth analysis of Riegl's work on the Roman Baroque and its contextualisation in contemporary Art Historiography, but also paves the way for a more thorough investigation of Riegl's manuscripts on Baroque art. The authors discuss the huge impact of Riegl's published contributions on the development of the historiography of the Baroque, and at the same time they shed light on the differences between published and unpublished texts and the related consequences on the reception of Riegl's investigation on Baroque art.11 Both the first and second edition of Riegl's lecture notes present some changes compared to the manuscript corpus, and some of these changes were probably carried out with the aim of increasing the usability of the selected passages from Riegl's manuscripts