6c4a0587_l_Fantasy_XIV__FFXIV__Fan_Site__2
[Item] Gold Castrum Coffer Key [Category] Miscellany [2] 
A small, glowing key found in the imperial fortres, Castrum Novum.
FFXIV Patch 1.22b Notes – New Items | Zantetsuken - A Final Fantasy XIV (FFXIV) Fan Site
2