Expositions: Sea Navigation, Antient Times, Thracian Culture, Greek colonisation, Early Christianity, Mediaeval Culture
Summer (1st of July -15th of September): Mo-Sa: 9-18h (lunch break: 13.00-14.00) ;
Winter (16th of September - 31th of May): Mo-Fr: 8-17h (lunch break: 13.00-14.00)
As with most Bulgarian museums this is primarily an educational and research resource but still makes for an interesting rainy day thing to do. The exposition chronologically displays locally-discovered artefacts from the Bronze Age to the period of Roman occupation.
Whilst most of the display is in Bulgarian there is a crib sheet available in several languages which gives you a sort of self-guided tour.
In winter the museum is open Monday to Friday from 9 am to 5 pm and in Summer from Monday to Saturday 10 am to 7 pm. Admission (Feb2010) is 2 leva and it appears that photos are allowed (well at least no-one told me otherwise).