Incoming group 20 is a simplified version of the entry group number 19.
This input group is designed in cases where in the immediate vicinity of the entrance door of your palace there are windows on both sides.
Therefore, in such an input decision, the columns on the sides are not involved. And all decorations are minimized. For the place of the columns are concrete blocks with pilasters.
But, at the same time, additional decorations are used, such as sculptures for balustrades, arched frames, relief cornices, poludugii from cornices and others.