1998 – Local election held; the lawyer Gianguido Guidotti [it] (center-right) becomes Mayor. He is the first Mayor of the center-right coalition elected by direct vote in the history of Piacenza. The incumbent Mayor Giacomo Vaciago is the first Mayor to not run for a second final term.
2002 – Local election held; Roberto Reggi [it] (center-left) becomes Mayor. The incumbent Mayor Gianguido Guidotti is the first Mayor to lost a run-off in the direct vote.
2007 – Local election held; Roberto Reggi (center-left) is re-elected Mayor. He is the first incumbent Mayor re-elected by direct vote.
2008 – Museo civico di storia naturale di Piacenza (museum) opens in the Fabbrica del Ghiaccio.[17]
2009 – Local election held; Massimo Trespidi [it] is elected President of the Province of Piacenza. He is the first President of the center-right elected by direct vote in the history of Piacenza. The incumbent Mayor Gianluigi Boiardi is the first President to lost at the first round in the direct vote.
2017 – Local election held; the lawyer Patrizia Barbieri (center-right) becomes Mayor. She is the first female Mayor elected by direct vote in the history of Piacenza. The incumbent Mayor Paolo Dosi is the second Mayor to not run for a second final term.
^ abTeta E. Moehs (1972), Gregorius V, 996–999: A biographical Study, Anton Hiersemann, pp. 57–58.
^Piacenza entry (in Italian) by Mario Longhena, Alda Levi Spinazzola, Arturo Pettorelli, Luigi Pairig, Tammaro De Marinis and Natale Carotti in the Enciclopedia Treccani (1935).