It's the coat of arms of Wassenaar, with the coat of arms of Valkenburg in the middle.

Are you asking about that large piece of heraldry right in the middle? If so, where are you from I might be able to pinpoint it more specifically if you provide that information.

By the way, that is absolutely not a swastika, to ease your mind. It is a piece of Royal Heraldry, I have an inkling of which, due to the quite horrid details of the picture, but I need an information of the country of origin.