Maksymilian333 - you stated that the location of the former Imperial Hunting Lodge in Spala is located in central Poland - east of Tomaszow Mazowiecki. 60 kilometers going east from Lodz and 110 kilometers going south from Warsaw. Would it be possible to be more specific? Maybe post a map of the exact location? Something that I could print out, take to Poland, and use to walk up to the exact site and look at the foundation stones?
Also, if you are at the location frequently, would it be possible to take some photos of the foundation stones, and anything else that remains, and post them here?