Khan al-Umdan, Ottoman caravanserai in Acre, Israel

Khan al-Umdan is a two-story caravanserai built around a central courtyard with a well and supported by 40 granite columns that hold up its arches. The covered galleries on all sides provide shelter, while the strong columns create the main structural framework throughout the building.

Khan al-Umdan was built in 1784 under Ahmed Jezzar Pasha on the site of the Royal Customs house of the Crusader Kingdom of Jerusalem. Its design is attributed personally to al-Jazzar, as with other public buildings he erected. In the 19th century, as Acre's port declined in favour of Haifa's, the ground floor was reduced to warehouses.

The khan's name, "Inn of the Columns," comes from its forty granite columns. In the 19th century Baha'ullah received guests here, and a Baháʼí school later operated in the building. Today the courtyard serves as an open-air stage during the Acre Festival in October.

Located near the port in the Old City, the site can be entered from the east side facing the market or from the west side leading to the harbor. Its central location makes it easy to combine a visit with exploring the surrounding lanes and alleys.

The 40 granite columns were transported from ancient Caesarea and repurposed for this structure. These stones, originally part of older buildings, were salvaged and rebuilt here, creating a physical link between different periods of the region's past.