The Shrine of Abu Lu'lu'a (Persian: بقعه ابولولو), also known as the Shrine of Bābā Shujāʿ al-Dīn (بقعه بابا شجاع الدين)[3] is a mausoleum built over what is popularly believed to be the final resting place of Abu Lu'lu'a Firuz, a Persian slave who assassinated the second Islamic caliph Umar ibn al-Khattab in 644.

[2] The historical Abu Lu'lu'a died in Medina (the capital of the early caliphate, situated in the Arabian Peninsula) shortly after his assassination of Umar ibn al-Khattab in 644 CE.

[6] At some later time, legends arose according to which Abu Lu'lu'a was saved from his pursuers by Ali ibn Abi Talib (the cousin and son-in-law of the prophet Muhammad, who is also revered by Shi'ite Muslims as the first Imam).

According to these stories, Ali instantaneously transported Abu Lu'lu'a by means of a special prayer to Kashan, where he married and lived out the rest of his life.

[7] During the 16th-century Safavid conversion of Iran to Shia Islam, a festival started to be celebrated in honor of Abu Lu'lu'a, commemorating his assassination of Umar.