Of the 85 original temples-most constructed of hard river sandstone-about 20 are still reasonably well preserved. Both internally and externally the temples are richly carved with excellent sculptures that are frequently sensual and, at times. The Khajuraho temples do not contain sexual or erotic art inside the temple or near the deities; however, some external carvings bear erotic art. Also, some of the temples that have two layers of walls have small erotic carvings on the outside of the inner wall. There are many interpretations of the erotic carvings. They portray that, for seeing the deity, one must leave his or her sexual desires outside the temple. They also show that divinity, such as the deities of the temples, is pure like the atman, which is not affected by sexual desires and other characteristics of the physical body. Many ancient ruins demonstrate that the people who constructed them had not only a special regard for celestial bodies and mathematics, but also a spot-on accuracy.