Visiting the Butterfly House

I went with a friend to the Devonian Gardens a couple of weeks ago and after a very deliscious ice cream treat headed over to the butterfly house. The heat and humidity just about knocked me out  but i did get this photo of this large butterfly or moth.with a hint of its beautiful blue inner wings but found the markings on the outside fascinating as well.Devonian gardens is run by the University of Alberta and is north of Devon, about a half hour west of Edmonton. Does anyone know what this butterfly/moth is?

©Jane Chesebrough