The brass lion, at the Shiva Temple in Barktapur Durbar Square. This temple is built directly in front of the palace. This metal lion was built in the 18th century and is made of brass with a thin layer of other metal coating on top. Nepal's metal products were later introduced. The oldest sculptures are usually built from stone. It is believed that the first batch of metal statue workers in the early days were Buddhist monks working for their Vihara religious school. In the past two or three centuries, metal works have flourished during the reign of King Mahler, when metal sculptures were coated with additional metal as a protective layer and decoration to eliminate degradation and corrosion.