Abū-Muhammad Muslih al-Dīn bin Abdallāh Shīrāzī, Saadi Shiraz better known by his pen-name as Saʿdī or simply Saadi, was one of the major Persian poets of the medieval period. He is not only famous in Persian-speaking countries, but has also been quoted in western sources. He is recognized for the quality of his writings and for the depth of his social and moral thoughts.
Saadi"s tomb is in the north-east of Shiraz. Set in a pleasant garden, the present tomb was built in 1952 and replaces an earlier much simpler construction. Unlike Hafez, Saadi travelled extensively in Iraq and Syeria, where he was even taken prisoner by the Crusaders. Upon His return to Shiraz, Saadi wrote his most famous works, the Bustan (The Orchard) and the Golestan (The Rose Garden), which are moral tales written either in verse or in a mixture of prose and verse. Saadi is said to have died in 1290 at the grand old age of 101.
Reference : Tebyan.net , wikipedia.org