The tomb of Fuxi (a legendary Chinese emperor) is called Taihao Mausoleum. It was built according to the mathematical logic of Fuxi's innate eight diagrams. The mausoleum is located 1.5 kilometers north of Huaiyang County in Henan Province. Of all ancient tablets bearing the erection date inside the mausoleum, there's the earliest "imperial tablet pavilion", which was erected in 1513 AD.