Judge Fakhr al-Din al-Aryan told the court that Hassoun's case was examined against the background of events that began when the regime crushed a peaceful pro-democracy uprising against Assad in 2011 with lethal force, sparking a devastating civil war in which more than 600,000 people were killed and 12 million others were forced to flee their homes.

"The court found that the official religious establishment, headed by the office of the mufti, had been used to provide religious cover for military and security operations and justify them publicly, including the use of barrel bombs against populated areas," Sana reported.

Barrel bombs are large cylindrical containers filled with explosives. According to one monitoring group, almost 82,000 barrel bombs were dropped by regime aircraft on rebel-held areas between 2012 and 2021, killing more than 11,000 civilians.

Prosecutors accused Hassoun of inciting violence against civilians and supporting the regime at religious lectures and public meetings, and in statements and media interviews.

They cited an interview with Syrian TV during the battle of Aleppo in 2015, when he told civilians to leave the rebel-held east of the city and said that "every area from which a shell is fired should be completely destroyed".

The court also found that the former grand mufti had "received money and gifts in exchange for intervening to secure the release of civilians detained by security agencies", and regularly provided financial support to a pro-regime militia, Liwa al-Quds, according to Sana.

Hassoun told the court that video clips had been taken out of context and that he had tried to save people from the regime.

Judge Aryan sentenced Hassoun to life in prison for inciting civil war and sectarian strife. He was also sentenced to 20 years for incitement to intentional killing, 10 years for principal participation in intentional killing, and three years for abuse of office.

On 11 August, Assad, his brother Maher and seven other former senior figures in his regime were convicted of crimes against humanity and sentenced to death by the same court. However, the only defendant tried in person was Atef Najib, a cousin of Assad and the former head of the Political Security intelligence agency in the southern city of Deraa.

Wassim Assad, another cousin and commander of a pro-regime militia, was sentenced to death in person the following week after being convicted of crimes including murder.

The trials have given Syrians some sense of justice in a country where many were frustrated with the lack of accountability for the crimes committed during the civil war. But human rights activists have called for more transparency on how the verdicts were reached.

In a separate development on Monday, the United States said it had rescinded its designation of Syria as a State Sponsor of Terrorism after 47 years, in line with President Donald Trump's promise to deliver sanctions relief.

Interim President Ahmed al-Sharaa's Islamist group, Hayat Tahrir al-Sham (HTS), was also removed from the list of Specially Designated Global Terrorist organisations.

HTS, formerly known as al-Nusra Front, was al-Qaeda's affiliate in Syria until Sharaa severed ties with the jihadist network in 2016. In late 2024, HTS led the rebel offensive that overthrew Assad and it dominates Sharaa's transitional administration.

"Today's action will help foster additional investment in Syria to promote political and economic stability," Treasury Secretary Scott Bessent said.

Last year, the US revoked the designation of HTS as a Foreign Terrorist Organisation and removed Sharaa from its list of Specially Designated Global Terrorists.