Zağnospaşa Bridge links the Zindan Gate with the İmaret Gate. It has two arches, one on top of the other. Roman and Byzantine work manship is observed on piers of the bridge. Historic records mention about the existence of a wooden drawbridge on the site of this bridge. Researchers reveal that the bridge consists of 4 construction layers. It was also repaired again aſter the repair of Zağnos Pasha in the 15th century.

In the memory of Gülbahar Hatun, mother of Sultan Selim the Grim, it was constructed within a külliye near the Zağnos Bridge on the west of Orta Hisar. Only a mosque and a tomb survived to the present, all other structures within the complex such as soup kitchen, medrese, public bath and school were all ruined. Historic records reveal that the complex was put up in 1514 aſter the death of Gülbahar Hatun.

Selim I, the great Turkish sultan, served as the governor of Trabzon for 22 years between 1489 and 1511. He became the governor of the sanjak of Trabzon at the age of 19, and acted like a president rather than like a governor of a sanjak. He even formed an army from the people of Trabzon against possible attacks to the sanjak. In 1491, he had the walls of Trabzon repaired, increased the number of his soldiers, and gave importance to the equipment of the soldiers.

There are plenty of historical artifacts in a narrow area in Ortahisar neighborhood. The oldest one among these artifacts is Altinbasli Meryemana Church (Panaghia Khrysokephalos Virgin Church) dated 914. It was converted to a mosque and started to be known as Fatih or Ortahisar Mosque. Mehmet Sultan, the Conquerer has performed his first Friday prayer here. The residence opposite to this mosque is the house where Suleiman the Magnificent lived. The house serves as a museum today.