Ayatollah Mahmoud Hashemi Shahroudi, a senior Iranian cleric and a former chief justice, died in Tehran on Monday after a long illness, state media reported.
Shahroudi, 70, was a close ally of Iranian Supreme Leader Ayatollah Ali Khamenei and had been seen by analysts as a possible successor to him.
He cut short a visit to Germany for treatment in January when activists referred him to German prosecutors, citing his record of passing death sentences which they said amounted to a crime against humanity.
Shahroudi was head of Iran’s hardline judiciary for a decade until 2009, but he implemented some reforms including banning death penalty by stoning, arguing it was tarnishing Iran’s image.