The said structure is located at the western end of the Qajar Avenue. It comprises of 16 interconnected structures, constructed by a merchant called, Haj Mohammad Reza Amini in the year 1275 AH.

The same is a remnant of the Safavid period, but was renovated during the Qajar era. The courtyard is rectangular with a large pool in the center.

The said bridge lies en route from Qazvin to Bo'inn Zahra. The bridge has three arches, two of which are larger. These arches are pointed.

The same is located on the Qazvin - Bo'inn Zahra Road and is a remnant from the Safavid age. The structure is a five sided one with two circular towers, and a rectangular courtyard.

The above mentioned is related to the Safavid era. But during the Qajar reign, Sa'dol Saltaneh, governor of the times, was responsible for its repairs, and named the same Chehel Sotune.