Where is the gold key in ruins lower stratum

[Zelkovion9876]

i'm havng a hard time finding or locating the gold key in the ruins lower stratum is. does anyone ha a map or set of maps for all floors of the ruins showing wher the gold door key is?

[ChromaRaine]

What version are you playing? Remake? Because if so, check your map at the northeast side and there's a place there with the key.

[Zelkovion9876]

i'm playing the pc version and am close to final boss fight i just can't find the key for the gold door to save my life.