Filibe had an important role in the struggle for Church independence which was, according to some historians, a peaceful bourgeois revolution. Filibe became the center of that struggle with leaders such as Nayden Gerov, Dr Valkovich, Joakim Gruev, and whole families. In 1836 the first Bulgarian school was inaugurated, and in 1850, modern secular education began when the "St Cyrill and Methodius" school was opened. On 11 May 1858, the day of Saints Cyril and Methodius was celebrated for the first time; this later became a National holiday which is still celebrated today (but on 24 May due to Bulgaria's 1916 transition from the Old Style (Julian) to the New Style (Gregorian) calendar). In 1858 in the Church of Virgin Mary, the Christmas liturgy was served for the first time in the Bulgarian language since the beginning of the Ottoman occupation. Until 1906 there were Bulgarian and Greek bishops in the city. In 1868 the school expanded into the first grammar school. Some of the intellectuals, politicians, and spiritual leaders of the nation graduated that school.