__.__.1904
foundation as Società Studio e Divertimento
__.__.1908
renaming to Società Sportiva Robur
__.__.1933
renaming to Associazione Calcio Siena
__.07.2014
dissolution due to financial problems
__.07.2014
new foundation as Robur Siena Società Sportiva Dilettantistica
__.__.2015
renaming to Robur Siena
__.__.2020
dissolution due to financial problems
__.__.2020
new foundation as ACN Siena 1904 Società Sportiva Dilettantistica
__.__.2021
renaming to ACN Siena 1904