September 22 is declared Open Doors Day at the oldest salt-extraction site in Europe – the Provadia Salt Mine (5500-4250 BC). The archeological complex consist of a salt extraction center and a necropolis, has been studied since 2005 by a team of the National Archeology Institute with Museum of the Bulgarian Academy of Sciences (BAS), in cooperation with the History Museum of Provadia and the participation of other Bulgarian and foreign experts. Research on the site goes parallel with terrain works for conservation and restoration of stone structures, especially the stone fortress built at the beginning of the late stone-copper era – around 4600 BC. Allthrough terrain works the site enjoys the interest of numerous visitors. Photos: BGNES

The UN association in Bulgaria marks the International Peace Day. This year we mark 32 years since the adoption of the Declaration of the General Assembly of the UN Organization on the Right of Peoples to Peace. Photo: BTA

As of September 25 the Central Bank of Bulgaria releases in circulation a silver commemorative coin “Rila Monastery”. It is one of the series of coins entitled “Bulgarian churches and monasteries”. The new coin is in circulation of 3000 and will be available at the pay desks of the Central Bank to the cost of BGN 66. Photo: BTA

The Small Main Street in the city of Plovdiv is the venue (starting today, till Sunday evening) of the traditional Crafts Fair with the participation of 70 master craftsmen working in 20 different crafts.  Photo: BGNES

Figures made entirely of chocolate make up the collection of prominent Chef Radi Stambolov. The items are shown within the frame of the Chocolate Workshop of the Tourism Vocational High School in Varna. Photo: BGNES

A Day of Martial Arts with open air demonstrations took place at the Knyaz Park downtown Sofia. The event is part of the programme “Sofia – European Capital of Sports”. Photo: BGNES