He is the fourth of Twelve Imams (peace be upon him), and his name is: Imam Ali son of Imam Al-Hussayn son of Imam Ali son of Abi Taleb (peace be upon all of them).
His mother: "Shah Zenan" daughter of Yazdegerd son of Shahrayar son of Khosrau, some said her name was "Shahrubanu".
He was called :Abu Muhammad or most famously Abu Al-Hassan, and some said Abu Al-Qasem.
His titles: Zayn Al-'Abideen [the adornment of the worshippers], Sayed As-Sajideen [the master of the prostrators], Sayed Al-'Abideen [the master of the prostrators], Az-Zakiy, Al-Ameen [the trustworthy], As-Sajjad [the prostrating a lot] and Dhu al-Thafanat, since the skin of his prostration points of his body [knees, palms and forehead] had become hardened and there were calluses on them like the knees of camels due to praying a lot.
The inscription of his ring: وما توفيقي إلّا بالله.
Place of birth: Medina.
Time of birth: Thursday the fifth of the holy month of Sha'ban, and some said: Thursday the ninth of Sha'ban, of the year 38 AH, two years before the martyrdom of the Commander of the Faithful (peace be upon him), while other historians state that it was on the year 36 AH and he lived four years with his grandfather the Commander of the Faithful (peace be upon him), ten years with his uncle Al-Hassan (peace be upon him) and eleven years with his father, or two years with his grandfather, twelve years with his uncle and thirteen years with his father.
He (peace be upon him) lived 57 years.
Time of martyrdom: 25th Muharram on 95 Ah or 94 Ah.
Place of martyrdom: Medina.
His killer: Hisham son of Abd Al-Malik who poisoned him as ordered by Al-Waleed son of Abd Al-Malik.
Burial place: Baqi' in Medina with his uncle Imam Al-Hassan (peace be upon him) in the same sanctuary, which was demolished by the Wahhabis.