On October 6, 1600, the world's oldest surviving opera, Euridice, premiered at the Palazzo Pitti in Florence. The music for the work was composed by the Florentine Jacopo Peri, and the libretto was written by the poet Ottavio Rinuccini. Dedicated to the wedding of King Henry IV and Marie de' Medici, the work establishes fundamental …

On October 5, 1879, the Governor-General of Eastern Rumelia, Prince Alexander Bogoridi, laid the foundation stone for the restoration of Stara Zagora. The city was almost completely plundered and destroyed by the advancing Ottoman army of Suleiman Pasha during the War of Independence, and its inhabitants were subjected to mass extermination, in which nearly 8,000 Bulgarians died. …