Historical clue formulations

• 700, in ancient Rome — 2019-10-01
• 700, to Caesar — 2011-10-11
• 700, once — 2010-02-07
• Multiple of LXX — 2007-11-10
• Roman 700 — 2007-03-19
• Turn-of-the-century year — 2007-01-24
• 700, on monuments — 2005-01-31
• Century year — 2004-10-01
• Year in St. Sergius's papacy — 2000-11-17