| Tribhuvan Sadan | |
|---|---|
त्रिभुवन सदन | |
 | |
| Former names | Happy Cottage |
| General information | |
| Status | Being rebuilt |
| Location | Narayanhiti Palace |
| Town or city | Kathmandu |
| Country | Nepal |
| Coordinates | 27°42′56″N 85°19′03″E / 27.715450841455088°N 85.31746608557542°E |
| Named for | King Tribhuvan of Nepal |
| Owner | Narayanhiti Palace Museum |
The Tribhuvan Sadan (Nepali: त्रिभुवन सदन) is a mansion in the Narayanhiti Palace, Kathmandu, Nepal. It is known for being the site of the Nepalese royal massacre where ten members of the royal family, including King Birendra, Queen Aishwarya, and Crown Prince Dipendra were killed. The mansion was formerly occupied by King Tribhuvan and his family and later by Dipendra, Crown Prince of Nepal. The Tribhuvan Sadan was demolished after the orders of the Queen Mother Ratna however It is currently being reconstructed.