Urartian art in the tower-like temples of Urartu. Aristobulus, one of the retainers of Alexander III of Macedon, mentions the structure known as "Solomon's Prison" as "the tower-like mausoleum" while describing Pasargadae; and if the mentioned structure is presumed the mausoleum of one of the Achaemenid shahs, due to its similarity to the structure Ka'ba-ye Zartosht, and as Franz Heinrich Weißbach and Alexander Demandt have explained, the structure should inevitably be considered belonging to another one of the Achaemenid shahs. Besides that, Ka'ba-ye Zartosht is a near to the mausoleums that were built at the same time; and all of them were later separated from the other parts of Naqsh-e Rustam by a chain of fortifications, indicating that they were all originally the same type and had similar applications. In other words, all of them, including they very Ka'ba-ye Zartosht, were mausoleums of Achaemenid grandees. Some other reasons can be stated for Ka'ba-ye Zartosht being a mausoleum; one is the triad and heptad units that are seen in the Achaemenid mausoleums. For example, the three-tomb chambers of the mausoleums connect them to making Ka'ba-ye Zartosht three-floor and its platform having three stairs; and the seven hatches of each floor of the structure remarks the Seven Persian Noblemen on the mausoleums and the Tomb of Cyrus having seven floors. However the probations done do not confirm the idea and the writings carved on the walls of Ka'ba-ye Zartosht have no indication to the existence of a mausoleum or tomb either. Treasury The idea of the structure being a treasury was first stated by Rawlinson in 1871. Rawlinson's reasons were the accurate architecture and the proper size of the chamber, its sole door being heavy and solid and that it was difficult to reach inside the structure. Walter Henning presented the theory with newer reasons. One of his reasons is about the inscriptions carved on the rim of the chamber; there is a large inscription by Shapur I on the walls of Ka'ba-ye Zartosht; and below that inscription, there is a writing by Kartir that states in its second line: "This "bon khanak" will be yours; do with it as you believe is better for the gods and us." Some historians conclude that it means the place was used for keeping religious bills, flags and documents. While describing landmarks in Istakhr, Ibn-al Balkhi mentioned the site with the title "Kuh-Nefesht" or "Kuh-Nebesht"