Ak saray - tower 2 - ks
The patterns on both towers are different, although equally constructed.
The pattern on the right tower too is created by overlapping squares, but here the overlapping part is shown as a little square, filled by a cross. This makes the unit repeat like like two separate L-figures with two different texts in kufisch:
aleiza w albaqa en alid w lah w alsakha (the Glory and the Life - the Father and Him and the generosity).