<P> The Kaogutu (考古 圖) or "Illustrated Catalogue of Examined Antiquity" (preface dated 1092) compiled by Lü Dalin (呂大臨) (1046--1092) is one of the oldest known catalogues to systematically describe and classify ancient artifacts which were unearthed . Another catalogue was the Chong xiu Xuanhe bogutu (重修 宣 和 博古 圖) or "Revised Illustrated Catalogue of Xuanhe Profoundly Learned Antiquity" (compiled from 1111 to 1125), commissioned by Emperor Huizong of Song (r . 1100--1125), and also featured illustrations of some 840 vessels and rubbings . This catalogue was criticized by Hong Mai (洪 迈) (1123--1202), who found that descriptions of certain ancient vessels dating to the Han Dynasty were incorrect when he compared them to actual Han Dynasty specimens he obtained for study . </P> <P> Song scholars established a formal system of dating these artifacts by examining their inscriptions, decorative motif styles, and physical shapes . Zhao Mingcheng (1081--1129) stressed the importance of utilizing ancient inscriptions to correct discrepancies and errors in later texts discussing ancient events, such as with dates, geographical locations of historical events, genealogies, and official titles . </P> <P> Bruce G. Trigger writes that interests in antiquarian studies of ancient inscriptions and artifacts waned after the Song Dynasty, but were revived by early Qing Dynasty (1644--1912) scholars such as Gu Yanwu (1613--1682) and Yan Ruoju (1636--1704). Craig Clunas also states that epigraphic studies weren't revived until the Qing Dynasty, but that printed copies of the Chong xiu Xuanhe bogutu were widely circulated in the 16th century during the Ming Dynasty (1368--1644). Trigger asserts that archaeology as a discipline of its own never developed in China and was always considered a branch of historiography instead . </P>

When did chinese court scholars begin investigating their own relics and monuments