Siosepol Bridge, also known as the Allahverdi Khan Bridge, is one of the eleven bridges in Isfahan, Iran, and among the most famous. Spanning the Zayandehrud River, it is the longest bridge on the river with a total length of 297.8 meters (977 ft) and a width of 14.75 meters (48.4 ft). Siosepol Bridge was constructed during the Safavid era, under the patronage of Shah Abbas I, around 1602. The bridge consists of 33 arches and two levels of terraces for pedestrians, which is a hallmark of its design enabling it to serve as both a pedestrian overpass and a place for socializing and enjoying the view of the river. The structure is made of brick and stone, and it has been well-preserved through centuries. Its elegant architecture and the role it has played in the social life of the city make it not just a bridge but also a meeting place. The name 'Si-o-se-pol' translates to '33 Bridge' referring to the number of arches it has. It is also one of the most popular tourist attractions and a symbol of Persian architectural advancement.