According to Kirat historian Iman Singh Chemjong( ᤀᤡᤔᤠᤏ ᤛᤡᤲᤜ ᤆᤣᤶᤈᤥᤅ ᤗᤡᤶᤒᤢ) , Bijaypur was the capital of the then Limbuwan Kingdom of king Bijayanarayan Raya khebang.

According to the history it is the tomb of the last Limbu king Buddhi Karna Raya Khebang Limbu of Limbuwan (Pallo kirat), He was tricked into coming to Bijaypur-Dharan for a negotiation, then killed by the assassins of Gurkhali King Prithvi Narayan Shah of the Kingdom of Nepal in 1773.

Budhhi Karna Khebang's soul is believed to have wandered around the area of his tomb around Bijaypur and was said to be a friendly and helpful spirit.

Some say Lord Shiva and Goddess Parvati under the guise of Theba Sammang and Yuma Sammang, Yakthung King and Queen in the process of hunting arrived at Vijaypur where they stuck their bows and sat in a penance.

Nowadays, lovers tie sacred threads to the bamboo after worshiping Budha subba.