Historical clue formulations

• "Peter ___ Greatest Hits" (1974 album) — 2018-02-04
• ___ Circus (ancient Roman stadium) — 2012-10-01
• ___ Circus (ancient Roman arena) — 2010-01-24
• "Peter ___ Greatest Hits" (1974 release) — 2007-02-10
• ___ Circus (where St. Peter was crucified) — 2007-01-07
• ___ Circus (ancient Roman arena) — 2006-12-10
• ___ Circus (old Vatican area) — 2003-10-24
• ___ Circus (where St. Peter was crucified) — 2000-06-01
• Pianist Peter and family — 1997-09-21
• Operas by Boito and Mascagni — 1996-07-07