Coming at you from over a hundred years after colonists entered the Atalia galaxy, the Courageous-class Star Carrier of the American Republic.
This carrier was in production during the invasion of York. After the Empire of Beta Centauri signed a peace treaty with the American Republic, this class was renamed in honor of the starship Courageous. The Captain of that vessel used her ship's SSF gate to destroy several imperial vessels. The Courageous's sacrifice enabled refuges extra time to flee the planet.
This particular carrier is designed in typical American fashion, resembling a boat in space, with sleek lines but yet being very plain in color and art. Its two primary cannons can cut through most shields in one blast, and its primary engines can accelerate this vessel faster than any other vessel of comparable size.
Only two were made, one being the prototype that was destroyed during the battle of York.
The second vessel served as the flagship for a few years until it was destroyed by the Centauri Empire during Gareth Mark Scutarie's reign. Pirates kept more of these vessels from being made.
Nice job! Looks massive, like it would hold many ships. Also looks like it has the ark, of Bible fame, as a model for its original design. I mean this in a good way since it is a very efficient design, achieving maximum productivity with minimum wasted effort & expense.