13 octombrie: ziua în care împăratul roman Claudius a murit otrăvit în circumstanțe misterioase. Succesor a devenit celebrul Nero

On October 13, significant historical events occurred, including the mysterious death of Roman Emperor Claudius in 54 AD, allegedly poisoned by his wife Agrippina to secure Nero's succession. This date also marks the discovery of the spiral galaxy M51 by astronomer Charles Messier in 1773, the birth of Romanian politician Take Ionescu in 1858, the Fátima miracle in 1917, Ankara becoming Turkey's capital in 1923, the death of sculptor George Apostu in 1986, and the fall of the Romanian government led by Emil Boc in 2009.