site.btaToday's Observances: May 11
![Today's Observances: May 11](/upload/312940/cyril-methodius.jpg?l=1000)
![Today's Observances: May 11](/upload/312940/cyril-methodius.jpg?l=1000&original=)
Sofia - The Church:
- Day of St Cyril and St Methodius, inventors of first version of Slavic alphabet in 9th century. Secular holiday marked May 24.
On this date in Bulgarian history:
1851: St Cyril and St Methodius Day first celebrated in Plovdiv
/RY/
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