The octagonal building was the place in which royal guests were hosted during the Zand dynasty of Iran. It was also used for holding official ceremonies.
It is also the burial place of Karim Khan Zand.
The old Nazar Garden was one of the largest gardens of Shiraz during the Safavid rule (1501–1722). During Zand dynasty (1750–1794) Karim Khan built an octagon structure which was called Kolah Farangi. It was used to receive and entertain foreign guests and ambassadors and hold official ceremonies.
In 1936 the pavilion became a museum. It was the first museum which was located outside the capital city of Tehran. The brick designs, tiling, pictures and big stone dadoes are among the architectural features of the building.
Pars museum is a display of almost 30 handwritten Qurans, a number of magnificent paintings of famous Persian artists. Among the paintings is the well-known Karim Khan’s Smoking Shisha created by Jafar Naqash. 
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- Pars Museum, KolahFarangi Mansion. M. Rostami (ISBN 978-600-91247-0-1), p. 9
- "Otraq.com, Iran's Tourism Guide"