Historical clue formulations

• Italian for "seven" — 2020-09-14
• Otto's preceder — 2019-08-23
• Quattro + tre — 2017-09-24
• Number of hills in Roma — 2016-11-08
• Otto's preceder — 2015-04-24
• Number of hills in Roma — 2015-04-14
• Number of hills of Roma — 2013-06-12
• Sei + uno — 2012-10-23
• Otto goes after it — 2012-09-28
• Sorrento seven — 2012-05-10
• Otto follows it — 2009-08-29
• Number of hills in Roma — 2009-04-14
• Otto's preceder — 2007-01-20
• Number of mari — 2006-07-28
• Otto preceder — 2006-02-10
• Number of hills of Rome — 2005-04-14
• Tre + quattro — 2004-07-13
• Winning craps roll, in Rome — 2001-05-09
• Hill count in Roma — 1999-07-08
• Tre + quattro — 1997-08-06
• Siena seven — 1994-12-06
• Otto's preceder — 1994-02-13