I had a delightful Christmas, and one of my the big gifts I received is the fantastic DC Comics: Year by Year, a "visual chronicle" that covers the entire seventy-five year history of DC Comics.
It's a beautiful book, and I'm slowly making my way through DC's history and learning something along the way. In the process I've come across something that will make somebody very happy.
I had just reached the entry for November, 1955 where Detective Comics #225 is discussed. The key point about Detective #225 is that it features the first appearance of Martian Manhunter. While reading the entry my mouth dropped open at these words:
"Now stuck on Earth, J'onn observed the culture and created the identity of John Jones, a crime fighter and investigator in Apex City."
The existence of an Apex City has previously been proposed. But now we have confirmation from an official DC publications proving that Martian Manhunter really did reside in Apex City.