Additional Info
Source: PVP Season 8 Reward
Empire Trophy: Season 8 SWTOR decoration, screenshots and information!
Hook: Floor Large (Purple Square): The Empire Trophy: Season 8 decoration fits into a large purple square floor hook.
The Empire Trophy: Season 8 decoration is retired.
These specific trophies used to be available from the Ranked PvP vendor, but are no longer availabled and are considered retired. Many similar trophies and reward moved over to becoming PvP Seasons Tokens rewards, but not all did.
Source: PVP Season 8 Reward