The Governor of Medina got the Imam poisoned. The Imam left this world on 25th Muharram 95 A.H. At that time his age, he was 57 years. He was buried in the graveyard of Baqi in Medina next to his uncle Imam Hasan (A.S).
It is reported from Imam Jaffer Sadiq (A.S) that at the time of his death Imam Zainul Abidin (A.S) had left special instructions concerning his camel which the Imam (A.S) used to take with him on his journey to Hajj. The Imam had told his family that his death would affect the camel very badly. After his death the camel should be left on its own to do what it pleased. The camel was therefore set free. It went straight to the grave of the Imam and started shedding tears. It remained in this condition till it died.
Such was the love of even animals to Imam Zainul Abidin (A.S).
With the passage of time a modest but beautiful Mausoleum was build to house the Imam's grave. Unfortunately, in A.D. 1926. the Wahhabi King of Saudi Arabia, destroyed the Mausoleum.
Muslims who go to the graveyard of Baqi cannot help cry when they see the poor condition in which the grave of the Imam is today.
Adopted from the book : "A Brief Biography of Ali bin Husain (a.s.)" by : "Muhammad Reza Dungersi Ph.D"
source : www.rafed.net