Additional Info
As far as I can tell, this decoration exists in the Strongholds Decorations list, but it does not actually exist in-game – there’s no way to actually get it. It is listed as a “bugged decoration” by another player on a report on the forum. It’s listed as “Source: Rare Drop: Tonvarr Pirates”. There’s a really fun theory post about where this decoration was supposed to come from, and why it is not actually available.
Here is the information about the decoration that used to be on TOR Decorating: