Sayyid Muhammad-Hassan Murtadha Dhiya al-Din (; 1889 – January 2, 1953), also known as Agha Hassan al-Killidar, was an Iraqi nobleman that served as the 20th custodian of the al-Abbas shrine from 1938 until 1953. Early life Dhiya al-Din was born in 1889 to Murtadha Dhiya al-Din. His father, grandfather, and great-grandfather all served as of the Abbas shrine before him. He hails from the noble Al Faiz family, and his ancestor Dhiya al-Din al-Faizi was the naqib of Karbala in 1622. Custodianship Dhiya al-Din became the of the Abbas shrine after the death of his father in May 1938. In 1926, the Iraqi government assigned ten notable figures from each Iraqi city to sign a protocol deeming Mosul a part of Iraq and not Turkey, as part of the Mosul Question. Dhiya al-Din's father was one of the figures and signatories representing Karbala. However his father fell ill so Dhiya al-Din signed on his behalf as his eldest son. In 1932, Dhiya al-Din's father established the first water supply in Karbala in their famous grove, Dhway, and after his death, Dhiya al-Din took control, and improved it greatly by providing new pumps, and sanitation systems. On July 17, 1930, a large feud began between the (mourning processions) of Kadhimiya and the mawakeb of Najaf broke out, leading to a larger feud between Najaf and Karbala, that saw the mawakeb of Najaf barred from entering Karbala during pilgrimage seasons. Compounding this running feud was the fact that the Najafis expected Karbala to side with them at the time of their feud with the Kadhmawi mawakeb, since it was a part of Karbala at the time, yet Karbala did not join and chose a neutral stand point. This sad issue ran for more than a decade, until Dhiya al-Din took it on himself to end this feud, and invited both mawakeb to his famous garden, for a large feast, and formed a peace treaty between them. From that day on, the mawakeb of Najaf returned to Karbala, and relations were restored. In 1948, a delegation from Mosul visited Karbala, after visiting Najaf to console the renowned poet, Muhammad-Mehdi al-Jawaheri on the death of his brother, who was killed during the al-Wathbah uprising. The delegation was hosted in Dhiya al-Din's famous garden. In February of 1952, the oil agreement instigated opposition parties to spark protests across the country, and so a march