Eastern stairs depict a procession of people bringing tribute to the king. On the top of these stairs, there are decorative patterns which were borrowed by the Arabs from the Persians. These decorations were used in the Islamic World, even as far as Cordoba in Spain.
There are several Achaemenid Royal inscription in the Apadana;
1 – ‘A great god is Ahuramazda, who created this earth, who created yonder sky, who created man, who created happiness for man, who made Xerxes king, one king of all kings, one commander for all commanders’.
2 – ‘I am Xerxes, the great king, the king of kings, the king of all countries, having all kinds of human beings, king in this earth far and wide, the son of king Darius, the Achaemenid’.
3 – ‘What was done by me here, and was done by me farther off, I did by the grace of Ahuramazda. May Ahuramazda and the gods protect me, my kingdom, and what I did’.