Si-o-se Pol or the Bridge of 33 Arches, also called the Allah-Verdi Khan Bridge, is one of the eleven bridges of Isfahan, Iran.
The Bridge of Allahverdi Khan across the Zayandeh River is a continuation of Chahar Bagh, the principal street in Isfahan. The Zayandeh River starts in the Zagros Mountains, flows from west to east through the heart of Isfahan, and dries up in the Kavir desert. It is highly ranked as being one of the most famous examples of Safavid bridge design.
Official name Si-o-se Pol
Crosses Zayandeh River
Locale Isfahan, Iran
Design Arch bridge, double-deck
Total length 298 metres
Width 13.75 metres
Longest span 5.60 metres
Number of spans 33
Beginning date of construction 1599
Completion date 1602
Commissioned in 1602 by Shah Abbas I from his chancellor Allahverdi Khan Undiladze, an Iranian ethnic Georgian, it consists of two rows of 33. There is a larger base plank at the start of the bridge where the Zayandeh River flows under it, supporting a tea house.