"new historical" is correct and usable in written English.
You can use it to refer to something that is new and relates to history, such as a "new historical novel" or "new historical discoveries".
"America was born in the streets," read the advertisements for Martin Scorsese's new historical epic, "Gangs of New York".
Some respond to new historical tragedies.
We're in new historical territory.
The occasion for this new historical study, in other words, is not any new historical information.
On Monday the currency hit new historical lows.
He is currently filming a new historical drama called Return.
9pm, ITV Amid much fanfare, ITV's new historical drama arrives.
Mr. Xi proclaimed "a new historical starting point," 40 years after the opening of relations.
At any moment, new historical circumstances, like industrialization or globalization, might upset the balance.
Likewise, Sudan enters a new historical era, that of the second republic".
The truth, brought out by new historical studies, has shaken Poland to the core.
