with gilded grills to admit natural light. While the pillars are an earlier Ottoman style, the wall paintings and decorations are from the later rococo period. Inside, the Imperial Council building consists of three adjoining main rooms. The 15th century Divanhane, built with a wooden portico at the corner of the Divan Court, was later used as the mosque of the council. There are three domed chambers: the first chamber where the Imperial Council held its deliberations is called the Kubbealtı, the second was occupied by the secretarial staff of the Imperial Council, and the third—called Defterhāne—is where the head clerks kept records of the council meetings. The main chamber Kubbealtı is, however, decorated with Ottoman Kütahya tiles. The Sultan or the Valide sultan was able to follow deliberations of the council without being noticed from a window with a golden grill. The window could be reached from the imperial quarters in the adjacent Tower of Justice (Adalet Kulesi). The window is mentioned for the first time in 1527 by the scholar Celalzade Mustafa Çelebi: "His Majesty [...] had built a high throne and a lofty loggia above the outer Council Hall where viziers sat, inventing a veiled window overlooking the Council Hall below. From this window, his Noble Excellency sometimes watched the events of the divan, checking the truth of affairs." The Tower of Justice (Adalet Kulesi) is located between the Imperial Council and the Harem. The Tower of Justice is several stories high and the tallest structure in the palace, making it clearly visible from the Bosphorus as a landmark. The tower was probably originally constructed under Mehmed II and then renovated and enlarged by Suleiman I between 1527 and 1529. Sultan Mahmud II rebuilt the lantern of the tower in 1825 while retaining the Ottoman base. The tall windows with engaged columns and the Renaissance pediments evoke the Palladian style. Imperial Treasury The building where the arms and armor are exhibited was originally one of the palace treasuries (Dîvân-ı Hümâyûn Hazinesi / Hazine-ı Âmire). Since there was another ("inner") treasury in the Third Courtyard, this one was also called "outer treasury" (dış hazine). Although it contains no dated inscriptions, its construction technique and plan suggest that it was built at the end of the 15th century during the reign of Süleiman I. It subsequently underwent numerous alterations and renovations. It is a hall built of stone and