Many period homes feature arched frames on in the hallways or stairwells. Residence 9 can be formed into shapes to replicate your originals. The more generous the Radius the better, but you can go down to around a 600mm diameter circle.
This window style has been popular throughout the 19th Century right into the 1930 Bay fronted housing styles. They often had an arched entrance screen. With Residence 9 you can replace your ageing windows and maintain the period look of your property.