The Center circle says Gallifrey.
White Version: https://www.teepublic.com/show/570141-six-chapters-white-version
Gallifrey and its chapters belong to BBC
Circular Gallifreyan developed by Loren Sherman
No one knows what it's like for Batman. The trauma runs deep. Emotional scars that will never heal. The perpetual call of the night, of doling out justice, now run through his veins. It's the only solace he'll ever need.