Which is gramatically correct? Or are they both correct? Pax Imperium or Pax Imperia? I think Imperium means something like "power, power status, authority, or strong nation", but I'm not sure if Imperia is a meaningful word in Latin, other than a geographical location. Only reason I ask is because I was going to do a project called "Pax Imperium" but someone told me the correct form would be "Pax Imperia", but I think I'm right and they are wrong...but now I'm not sure.