Sofia hides its history in layers: Roman Serdica under a shopping street, a 4th-century brick rotunda in a government courtyard, Ottoman mosques beside Soviet-era ministries. Three days to read the city from Thracian tombs to 1989.
Roman streets, brick drains and 4th-century houses of Serdica, excavated during metro construction and left open under glass canopies between Serdika I and II stations. Free, open-air, accessible 24/7 via the Largo underpass.
Sofia's oldest building: a red-brick Roman rotunda from the 4th century, standing in the courtyard of the Presidency. Inside are five layers of frescoes, including 10th-century angels painted over Ottoman-era whitewash from its years as a mosque.
Built in 1566 by Mimar Sinan, architect of Istanbul's great mosques, over Sofia's thermal springs — steam still rises from vents beneath. It anchors the block where a mosque, synagogue, Orthodox cathedral and Catholic church stand within 300 metres.
A half-buried 14th-century Ottoman-era church sunk below the level of the Largo, built low so it would not exceed the height of a mounted rider. Bulgarian tradition holds that revolutionary Vasil Levski was buried beneath its floor.
Bulgaria's largest museum, housed in Todor Zhivkov's former communist government residence in Boyana. Its 650,000 items include the 4th-century BC Panagyurishte gold treasure and Thracian chariot burials from Valchitran.
A UNESCO site whose 1259 frescoes show individualised faces of Sebastocrator Kaloyan and Tsaritsa Desislava a century before the Italian Renaissance. Only eight visitors at a time, for ten minutes, to protect the pigments.
A sculpture park of dismantled communist monuments — Lenins, Dimitrovs and the red star that once topped the Party House — plus 60 propaganda paintings and a screening room of state newsreels from 1944-1989.
The 1954 obelisk whose bronze relief of advancing soldiers was repeatedly repainted by activists as superheroes and Ukrainian flags. The soldier figures were removed in December 2023; the plinth and the argument over it remain.
A 1980s Sofia apartment restored down to the Rodina radio, ration coupons and jars of lyutenitsa. An audio guide follows the fictional Ivanov family through queues, informers and the 1989 fall of Zhivkov.
The largest Sephardic synagogue in southeastern Europe, opened 1909 with a two-tonne brass chandelier. Its small museum documents how 48,000 Bulgarian Jews were saved from deportation in March 1943 after protests by MPs and clergy.
Sofia's pre-war bourgeois district of secession-era villas, many still bullet-scarred from the 1944 Allied bombing. The Doctors' Monument here lists 531 Russian medics who died in the 1877-78 Liberation War.
The 1911 neo-Renaissance Halite, built over a Roman-era street and a Jewish quarter well, sits beside Zhenski Pazar — the women's market trading on the same ground since Ottoman times.