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This is probably the most famous of Isfahan's bridges. It is made up of a series of 33 arches and was commissioned in 1602 by "Shah ‘Abbās I" from one of his Generals. The name - Si-o-Seh Pol is derived from the Persian for 33 (Si-o-Seh).

The bridge was originally known as the Bridge of Allahverdi Khan who was the general responsible for its construction. The lower level of 33 arches is surmounted by a second layer, with one arch above each of the pontoons and two arches above the lower single arch, giving it its name and rhythmic appearance.

The bridge itself is 295m long and 13.75m wide. The thirty four piers on which it is constructed are 3.49m thick and the arches are 5.57m wide. The southern side of the bridge, where the waters of the Zayandeh run more swiftly has supplementary arches, and it is this that makles them suitable as a tea house. The bridge acted as a springboard for the development of the Khajou Bridge some 50 years later.