The window slot 27 is quite high, so it's definitely needed to be used on higher floors.

In his design, the same columns with curls used as in option 20. However, it could be used in the design of any floor.

And it's not even the fact that the window hole in the design of the longitudinal half of the balustrade, and the fact that it is framed by a large enough cornice, stylized under the frame.

And in addition to it, one more Cornices with modils has been installed from above, which gives a clear pattern border to the end of the slit.