Complex sentence: It appears to have been modelled at least in part on Louis Sullivan's 1887 Chicago Auditorium Building, albeit with far more Victorian and Edwardian colonial architectural embellishments, which leave the building more in keeping with its neighbours.
Split into simpler sentences: It appears to have been modelled at least in part on Louis Sullivan's 1887 Chicago Auditorium Building, albeit with far more Victorian and Edwardian colonial architectural embellishments. These embellishments leave the building more in keeping with its neighbours.