The phrase "although historically" is correct and usable in written English.
You can use it when you want to make a comparison between different states or conditions in the past and present. For example: Although historically, this region was known for its cold climate, the rising temperatures over the years have made it a much milder place to live.
The aboriginal peoples have occupied the region for thousands of years, although historically there has been considerable population movement.
It is the traditional music of Colombia's Caribbean coast, and although historically the popular music of the poor, it has a passionate following among all Colombians.
Emboffs have regular exchanges with like-minded countries on financial crimes matters, although historically these efforts have focused on al-Qaida and Iran.
It has the real potential to happen here if this deal gets that far, although historically most hostile suitors have capitulated after losing the first round.
Although historically there were numerous harbours along the Zhejiang coast, coastal shipping accounted for only a small percentage of the total freight volume for some time.
I don't identify as being a postmodern dancer, although historically that seems to be a way to place an artist somewhere.
Another is that although historically my favorite restaurant beef stir-fry has always contained snow peas, sugar snaps are juicier and more succulent, but are just as crunchy.
Although historically the economic links between Northern Ireland and its closest neighbour, the republic of Ireland, were remarkably underdeveloped, trade between the two has grown substantially.
Although historically based in the north, in the last two or three years they have spread across the country, where they single out people they believe help the rebels.
Although historically the amygdala was considered to be involved primarily in fear and other emotions related to aversive (unpleasant) stimuli, it is now known to be involved in positive emotions elicited by appetitive (rewarding) stimuli.
Although historically it was a predominantly Flemish-speaking city, at present the majority of residents in the Brussels agglomeration speak French, which is also the preferred language of the city's growing international labour force.
