Bouddha (बौद्धनाथ; Nepal bhasa: खास्ति चैत्य; བྱ་རུང་ཁ་ཤོར།, ), also known as Boudhanath, Khasti Chaitya and Khāsa Chaitya is a stupa in Kathmandu, Nepal. Located about from the center and northeastern outskirts of Kathmandu, its massive mandala makes it one of the largest spherical stupas in Nepal and the world.
The stupa is said to entomb the remains of Kassapa Buddha. It is located on the ancient trade route from Tibet which enters the Kathmandu Valley by the village of Sankhu in the northeast corner and continues to the ancient and smaller stupa of Chabahil named Charumati Stupa (often called "Little Boudhanath"). It then turns directly south, heading over the Bagmati River to Lalitpur, bypassing the main city of Kathmandu (which was built later). Tibetan merchants have rested and offered prayers at Boudha Stupa for many centuries. Following the 1959 Tibetan uprising, a large number of the Tibetan refugees migrated to Nepal and settled down around Boudhanath. The influx of the Tibetan refugees has seen the construction of over 50 gompas (Budhhist monasteries) around Boudha. As of 1979, Boudha Stupa is a UNESCO World Heritage Site. Along with Swayambhu, it is one of the most popular tourist sites in the Kathmandu area.
According to the Newar Buddhist history of Nepal, where the Narayanhiti Palace currently stands once stood the palace of King Vikramaditya (of the Licchavi kingdom). King Vikramaditya instructed that a traditional stone drinking fountain (dhunge dhara or lwã hiti) should be built in the southern part of the palace courtyard. When the new fountain produced no water, the king consulted his astrologers, who suggested that what was needed was a human sacrifice of a male candidate having Battis-Lakshanas, or thirty-two perfections. Only the king himself and his two princes were suitable candidates, so the king decided to sacrifice himself to bring water to the fountain. According to local mythology, during the sacrifice (performed, at the king's order by one of his sons), the king's head flew off, landing at the nearby Sankhu Bajrayogini Temple.