Historical clue formulations

• River of Tuscany — 2020-01-15
• Roman river — 2019-12-05
• River near the Pantheon — 2018-12-21
• It flows near the Sistine Chapel — 2017-11-17
• River near the Vatican — 2016-08-09
• Rome's river — 2015-07-21
• View from Vatican City — 2013-08-15
• Italian waterway — 2010-11-24
• River of Rome — 2009-03-31
• Rome's river — 2004-09-29
• River of Rome — 2003-03-11
• Rome's river — 2000-03-20