Durbar Square is the generic name used to describe plazas and areas opposite the old royal palaces in Nepal. It consists of temples, idols, open courts, water fountains and more. Before the Unification of Nepal, Nepal consisted of small kingdoms, and Durbar Squares are most prominent remnants of those old kingdoms in Nepal. There are numerous local guides around, should you want to gather a bit more information on the location.
Photos taken June 2012.