The four C's or S's...

Here is part of a wall on the stairs of Belgrade's new sports arena, and shadows cast below. You can see that the pattern is made up of four Cyrillic alphabet C's, which actually represent the letter S. They stand for Serbia's slogan and popular motto "Само слога Србина спасава/Samo sloga Srbina spasava" or "Only Unity Saves the Serbs," which also is used as a cry against foreign domination and national disunity. This pattern is also displayed on the Serbian cross and on the Serbian national coat of arms. The origin of this symbol is of the Byzantine coat of arms where four stylized Greek letters "Β" stood for the imperial motto "Basileus Basileon Basileuon Basileusin" or "King of kings, ruling over kings," in Greek.