Ancient photo of Amsterdam.. or is it?

One of my hobbies is photography and photoshopping aswell! I took this picture in Amsterdam near Waterloo square. It was late in the summer evening and sun had almost set when I set up to take this photo.

I like experimenting with longer shutter speed so the conditions where good for that. When later I reviewed the photo on my computer I got creative. I wanted to make it look old and ancient! Many hours and filters later this is the result. I showed it to lots of people and got really good responses on it! Many actually believed it to be a very old photo I found in some dusty archive.
Actually if you look closely at the photo you will see some new cars that are parked!
So what do you guys think of it!?