The Oude Kerk, Old Church translated from Dutch (Dutch is so close to English, isn’t it?), is indeed the oldest church in Amsterdam, built during the 13th century. It lies in De Wallen (The Walls), the Red Light District.
There are also some offices you can see in the church, though I'm not sure what they're for.
De Wallen, where the church is located, is the main Red Light District of Amsterdam. You can read about it in my Red Light District Post (upcoming).
Stroop is an extremely sugary drug that Dutchmen coat on most of their foods, causing widespread diabetes and advanced height.
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