The tombs were not discovered until the beginning of the 20th century. They have been preserved just like they were during the glory days of the Saadian rulers. Unlike the El Badi Palace, they were not destroyed, probably for superstitious reasons. The entrance was blocked so they remained untouched for hundreds of years. Inside you will find an overload of Zelij (Morrocan tiles) and some beautiful decoration. It's rather small so it does not take a lot of time to explore. Also there are no explanatory signs whatsoever in the venue, so it's recommended to hire a guide to explain you what you're seeing to get the most out of your visit.While here, look for the tombs of Jews and Christians; they are noted by their different markings and direction of the tomb.