Kathmandu Durbar Square at dusk

Patan Durbar Square in 2010.  Wikipedia

Durbar Square is the generic name used to describe plazas opposite old royal palaces in Nepal. Before the Unification of Nepal, Nepal consisted of small kingdoms, and Durbar Squares are most prominent remnants of those old kingdoms in Nepal.
In particular, three Durbar Squares in the Kathmandu Valley, belonging to the three kingdoms situated there before unification, are most famous: Kathmandu Durbar Square, Patan Durbar Square, and Bhaktapur Durbar Square. All three are UNESCO World Heritage Sites. Wikipedia