Following publication of this article, it was discovered that three of the unexpectedly early radiocarbon dates measured in 1999 from samples obtained by coring underneath St Mark's Basilica had been withdrawn from the literature while the article was in production, and were subsequently replaced by new measurements (published in Reference Higham, Ramsey, Chivall, Graystone, Baker, Henderson and Ditchfield2018, Reference Ammerman, Pearson, Kuniholm, Brown and Vio2019 and Reference Higham, Ramsey, Chivall, Graystone, Baker, Henderson and Ditchfield2020).
The new dates do not meaningfully affect the authors’ model estimate of when settlement began in the Piazza San Marco area, but to avoid any confusion regarding the withdrawal of the original dates, the authors have revised Figure 4 and the online supplementary information accompanying the article.