Taken by the law enforcement group of the Islamic State of Iraq and Syria (ISIS), a Chaldean Catholic church was desecrated and converted into a garrison.

Lieutenant Colonel Abdulamir al-Mohammedawi of Iraq's elite Rapid Response Division in Mosul told the AFP that they have liberated Um al-Mauna (Our Lady of Perpetual Help) Church and its surrounding areas from the terrorist group's control last week.

According to him, the church was occupied by the ISIS Hesba Division — the militant group's religious police force — who were "tasked with making sure (Mosul) residents had a beard, wore short robes, and followed their extremist convictions."

The elite force found no trace of Catholic faith in the place of worship.

Efforts to erase Christian influence could be seen on the building's exterior walls. The words "No entry, by order of ISIS Hesba Division" seem to indicate blunt defiance of the "Chaldean Catholic church" sign above the gate of Um al-Mauna.

The place of worship now houses demolished statues of Jesus Christ and the Virgin Mary, dismantled crucifixes, and defaced walls and foundations. Posters promoting ISIS ideals cover most of the church's marble pillars and rubble-covered floors.

The extremist propaganda materials revealed disturbing glimpses of the Mosul residents' life during the ISIS takeover. The Iraq-led coalition forces found a "town document" that laid down 14 rules that the people in Mosul must follow.

A law bans the "trade and consumption of alcohol, drugs, cigarettes" while another measure provides specific instructions regarding women's attire. Under the militant group's regime, women must wear conservative clothing and are only allowed to leave their homes "when necessary."

There are also rules forbidding adultery, homosexuality, and theft. Most of the materials are complemented with chilling depictions of the corporal punishments lawbreakers must face.

Some of the scattered pamphlets show illustrations of thieves having their hands cut off, women being stoned to death due to adulterous relationships, and homosexuals getting thrown off rooftops.

Residents who were caught smoking and drinking are killed, and women and children who did something out of line in relation to the militant group's laws suffer various forms of brutal torture.

According to previous reports, ISIS members have been torturing their Christian captives into either death or religious conversion to eradicate all traces of Christianity. The militant group used churches as torture chambers.

The walls of the Chaldean Catholic church were also used to display warfare details such as the terrorists' aliases and the instructions on how to use a Kalashnikov rifle.