A “Protect Our Children” vigil to honor the 19 children and two teachers killed Tuesday at Robb Elementary School in Uvalde, Texas, is planned for 6 p.m. Friday at City Hall, 795 Massachusetts Ave., Central Square.

It’s part of a small wave of public demonstrations: Thursday saw a “Rise Up 4 Abortion Rights!” protest in Harvard Square. Last week, there was a candlelight vigil in remembrance of George Floyd and other victims of police brutality at City Hall.