SHM is small so it won’t take you more than an hour and a half to see everything plus I highly recommend you to explore this part of old Sofia city where the museum is situated. Also it is located in the famous building of the renovated Central Mineral Baths.
The museum has 3 floors that will show you everything about Sofia’s history, culture and life in the past.
You will see a couple of cool things: a real golden chariot from the palace of Versailles – a gift for king Ferdinand’s wedding; the model of Mercedes Benz from 1905; a retro bicycle with one big and one small wheel and a retro tram where you can take photos or watch a movie about the city’s public transport.
My favourite part of the permanent exhibition is the Archaeology hall showing artifacts back to the Neolithic era. The collection is small but exciting.
You’ll find some examples of retro clothing, Bulgarian traditional clothes and costume accessories, small collection of children’s toys dating back to the beginning of the 20th century, music instruments, newspapers, tickets from public transport and all other kinds of stuff from Sofia’s past.
Important: from SHM you can buy tickets for thematic guided tour among the ruins of the ancient Roman city of Serdica. In English the tour is held every third Wednesday of the month and the beginning is at 12:30 in front of the main entrance. It is only 30 minutes and the price is really good – 3 euro/4 BGN per person.