January 2002 - Priest sex scandal breaks in Boston.
March 2002 - Archdiocese of Philadelphia says that it knew of 35 diocesan priests who had sexually abused about 50 children over the past 50 years. Gives names of six to police. Says others were too old to prosecute.
April 2002 - Philadelphia grand jury begins investigating priest sex-abuse complaints here.
March 2003 - State appeals court throws out suit by 18 abuse victims seeking to sue Philadelphia Archdiocese.
December 2003 - Archdiocese confirms dismissing four priests for sexually abusing teenagers.
February 2005 - Priest pleads guilty to sexually abusing 15-year-old boy at North Catholic High School.
June 2005 - Church, in sex scandal, defrocks seven priests who had served in dozens of area parishes.
August 2005 - Grand jury reports dozens of children abused by more than 50 priests over past 50 years but calls for no charges, citing statute of limitations.
September 2005 - Archdiocese announces two more priests are defrocked.
April 2006 - One priest defrocked, another agrees to life of "penance and prayer" in sex scandal.
December 2006 - Federal judge throws out child-sex-abuse-related class-action lawsuit against Archdiocese and its former leaders.
April 2007 - Archdiocesan priest defrocked for what grand jury called "depraved and sadistic behavior with many boys."
February 2008 - Philadelphia priest who grand jury said had "long history of abusive and manipulative relationships with adolescents" is defrocked.
February 2010 - Second Philadelphia grand jury impaneled when new priest-sex complaints surface.
Yesterday - Four priests and a lay teacher indicted in connection with sex abuse or with covering it up.