site.btaToday's Observances: May 30
![Today's Observances: May 30](/upload/276921/calendar_2.jpg?l=1000)
![Today's Observances: May 30](/upload/276921/calendar_2.jpg?l=1000&original=)
The world:
World Challenge Day.
On this date in Bulgarian history:
1924: Foundation stone laid for St Kliment Ohridski University of Sofia. Construction completed in 1934.
1975: House of Soviet Science and Culture inaugurated in Sofia (renamed
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