Den was a pharaoh of the First Dynasty. He is the best archaeologically-attested ruler of this period. Den is said to have brought prosperity to his realm and numerous innovations are attributed to his reign. He was the first to use the title "King of Lower and Upper Egypt", and the first depicted as wearing the double crown (red and white). The floor of his tomb at Umm el-Qa'ab near Abydos is made of red and black granite, the first time in Egypt this hard stone was used as a building material. During his long reign he established many of the patterns of court ritual and royalty used by later rulers and he was held in high regard by his immediate successors.