Here is a wip of a Roman battleship from 1917. It was built as an emergency wartime measure, as several Roman dreadnoughts had been lost in a combined Gaul and Germanic ambush, Germania had not officially entered the war yet. When commisioned, the Devesatio was the biggest and most powerful warship in the world. Armed with 4x2 16 inch guns, 18 5 inch guns, 8 76mm AA guns, and 8 torpedo tubes. She was also the first Roman battleship to have a significant torpedo bulkhead, and she was also heavily compartmentilized. Heavily armored, the ships of this class would survive several wars, in the course of three decades.
It is still a wip, I have much details to add. As always, just comment on what you think is good, and bad.