Victims of the Pittsburgh synagogue attack that killed 11 people last year will be remembered during a memorial service in the Pennsylvania Capitol.

The unusual joint session Wednesday will bring together the House and the Senate for prayers and speeches about the Oct. 27 shooting at the Tree of Life.

Members of the three congregations that were holding services that day are expected to attend.

Family members Tree of Life synagogue shooting victims listen to Pittsburgh Mayor Bill Peduto after he signed three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)
Family members Tree of Life synagogue shooting victims listen to Pittsburgh Mayor Bill Peduto after he signed three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)

The service comes a day after the Pittsburgh mayor signed new gun control measures that were introduced weeks after the massacre.

The legislation was immediately challenged in court by gun rights advocates.

A truck driver named Robert Bowers faces charges for the attack that could bring the death penalty.

Leigh Stein, daughter of Tree of Life synagogue shooting victim Dan Stein, wipes away a tear as Pittsburgh Mayor Bill Peduto signs three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)
Leigh Stein, daughter of Tree of Life synagogue shooting victim Dan Stein, wipes away a tear as Pittsburgh Mayor Bill Peduto signs three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)

Authorities say Bowers expressed hatred of Jews during the rampage that also injured seven people.

Pittsburgh Mayor Bill Peduto, surrounded by supporters and family members of Tree of Life synagogue shooting victims, signs three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)
Pittsburgh Mayor Bill Peduto, surrounded by supporters and family members of Tree of Life synagogue shooting victims, signs three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)
Pittsburgh Mayor Bill Peduto shakes hands with supporters and family members of Tree of Life synagogue shooting victims after he signed three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)
Pittsburgh Mayor Bill Peduto shakes hands with supporters and family members of Tree of Life synagogue shooting victims after he signed three gun-control bills into law, Tuesday, April 9, 2019, at the City-County Building in downtown Pittsburgh. (Steph Chambers/Pittsburgh Post-Gazette via AP)