元代的内府鉴定家中,柯九思是最著名的一位。元代文艺最为繁荣的文宗时期,柯九思鉴定、整理了大批内府所藏古代书画珍品,这对当时及后世古书画的流通产生了深远影响。另外,柯九思本人又是一位私人收藏家,有着当时雄视江南的书画珍藏。柯九思在元文宗时进人内府,在此之前他已经有了丰富的私人收藏,其中不乏时人艳羡的魏晋法书、五代宋人 In the Yuan Dynasty, the identification of Neifu house, Ke Jiusi is the most famous one. During the period of the most prosperous Wenzong in Yuan dynasty, Ke Jiusi identified and sorted out a large number of ancient paintings and calligraphies and treasures collected in the Neihu Dynasty, which had a profound impact on the circulation of ancient calligraphy and painting at that time and later. In addition, Ke Jiusi himself is a private collector, has a magnificent collection of paintings and calligraphers. Ke Jiusi entered the government in the Yuan Wenzong, before that he had already had a wealth of private collections, many of whom envy entertained the Wei and Jin Dynasties, the Five Dynasties Song