According to German-language sources, Loredana Marcello died in Venice on 11 December 1572, ending her tenure as Dogaressa.
German-language biographical sources, including the German Wikipedia, record that Loredana Marcello died in Venice on 11 December 1572, after serving as Dogaressa for approximately two and a half years since her husband Alvise I Mocenigo's election as Doge in May 1570.
Her death occurred during a period of considerable upheaval for the Venetian Republic, which was still contending with the aftermath of the Fourth Ottoman–Venetian War, including the recent loss of Cyprus and the momentous naval victory at Lepanto in 1571. As the ceremonial consort of the Doge, her passing would have been marked by official mourning within the Venetian state apparatus, reflecting the important symbolic role Dogaressas played in the Republic's public life.
The discrepancy between this German-sourced date and the alternative date of 12 December found in English, Spanish, and DBpedia sources illustrates the challenges historians face when reconciling early modern records across different archival and translation traditions. Such single-day discrepancies are common in Renaissance-era biographical records, often stemming from differing calendar conventions, transcription of original Venetian documents, or the moment at which death was officially registered versus when it occurred. Both dates are preserved here to reflect the full scholarly record, since no single primary source has been definitively established as authoritative over the other.