Legends:There are many legends describing as to how the temple of Lord Pashupatinath came to existence here. Some of them are :-
The Cow Legend: Legend says that Lord Shiva once took the form of an antelope and sported unkown in the forest on Bagmati river's east bank. The gods later caught up with him, and grabbing him by the horn, forced him to resume his divine form. The broken horn was worshipped as a linga but overtime it was buried and lost. Centuries later an astonished herdsmen found one of his cows showering the earth with milk. Digging deep at the site, he discovered the divine linga of Pashupatinath.
The Linchchhavi Legend: According to Gopalraj Vamsavali, the oldest ever chronicle in Nepal, this temple was built by Supus Padeva, a Linchchhavi King, who according to the stone inscription erected by Jayadeva 11 in the courtyard of Pashupatinath in 753 AD, happened to be the ruler 39 generations before Manadeva (464-505 AD).
The Devalaya Legend:Another chronicle states that Pashupatinath Temple was in the form of Linga shaped Devalaya before Supus Padeva constructed a five storey temple of Pashupatinath in this place. As the time passed, the need for reparing and renovating this temple arose. It is learnt that this temple was reconsturcted by a mediaeval King named Shivadeva (1099-1126 AD). It was renovated by Ananta Malla adding a roof to it.