Some folks are better with Google than others, so I'll explain how I quickly checked out this hotel. I Googled for the hotel name and found a third-party site that gave the hotel's address. I then Googled that address to see what came up.
Often when I'm looking for such info, I just Google the name of the hotel and the word "formerly." Tripadvisor.com often comes up in those searches. For example, try this...
http://www.google.com/search?sourcei...dien+amsterdam