Vintage Pencil Drawing Christianbourg Castle Copenhagen Matted Framed Colored

Lovely vintage drawing under glass with highlighted colored pencil or perhaps even watercolor. Signed Christianbourg Castle Copenhagen, P White artist bottom right hand corner.  Very nicely completed and framed. Large deep beige, neutral matting shade along with silver distressed wood frame. The frame measures 19.5" by 18" and the drawing is 10" by 8".  Good condition overall with some minor damage to the silver frame, tiny nicks and chips in finish. Not bad at all.