An unhinged brute cold-cocked a 53-year-old woman in the back of the head outside a church in Queens, cops said Tuesday.

The violent encounter unfolded outside Saint Michael’s Church at 136-76 41st Avenue in Flushing just after 12 p.m. on Oct. 28, cops said.

The unnamed man, who often sleeps in the church, went berserk when the victim tried to get him out of the church and snapped a photo of the unstable man, according to cops.

The woman was taken to Booth Memorial Hospital for minor injuries.

The NYPD released a video of the violent encounter Tuesday evening.