The St George Rotunda is the oldest architectural monument in Sofia and the city's only building since the time of the Roman Empire that has been preserved as fully functional. It is believed to have been built by Emperor Constantine the Great in the early 4th century, when what was Serdica at the time was thriving as one of the most significant Roman cities on the Balkan Peninsula.

Etara, the architecture and ethnography reserve and one-of-a-kind outdoor museum which boasts a live and functioning ethnographic exposition is located near the city of Gabrovo. Its name is derived from the ancient name of the Yantra River over whose banks the museum spans. Every visitor of the Etara complex has a chance to travel back in time, share the folk traditions, feel the breath of the olden times and learn more about old Bulgarians' way of life.

The “Vavedenie Bogorodichno” (Presentation of the Blessed Virgin Mary) Monastery is located in the gorge of the Nishava river not far from the village of Razboishte and some 70 kilometres northwest of the capital Sofia. The area abounds in unapproachable crags, caves and rock niches, which attracted monks in the Middle Ages and lent itself to the building of many churches and monasteries in the rocks.

The Daskalov House in the town of Tryavna is one of the most remarkable Bulgarian architecture monuments of the National Revival period. The house was built at the beginning of the 19th century, circa 1804-1808, by the prominent local merchant Hadji Hristo Daskalov for his two sons. It is famous for its ceilings decorations - wood-carved sun rays which to this day shine over the two guestrooms of the house.

The most important medieval treasure connected to Bulgarian history was discovered and is being kept outside of the present-day Bulgarian state's territory. It was unearthed near the village of Malaja Pereshchepina, in today's Ukraine, and is related to Khan Kubrat.

Nicopolis ad Nestum is just one of a number of ancient cities in Bulgaria, but in the Rhodope Mountains it is the sole well-preserved one from the Roman era. It is located in the south-western part of the country, near the modern city of Gotse Delchev. Built in 106 by Emperor Trajan to commemorate his victory over the Dacians, it came to replace a Thracian settlement of the Bessoi tribe. In Latin its name means Victory City on the Mesta River and it is one of only 10 cities entitled to bear the name of Trajan's father - Ulpius.

Plovdiv, the second largest city in Bulgaria and European Capital of Culture 2019, boasts unique ancient treasures which makes the city one of Bulgaria's most popular tourist destinations. Along with the antique sights, Plovdiv offers an opportunity to follow the development of the Bulgarian culture throughout the period of the National Revival. The Old Plovdiv, located on one of the seven hills of the city, has preserved the greatest number of authentic buildings dating back to this period.

The Holy Trinity Monastery of Divotino, founded way back in 1046 and popular among the locals as “the king's monastery”, huddles in the folds of Mount Lyulin, 5km away from the town of Bankya and 20km from Sofia. It is among the earliest cloisters in the group of monasteries known as the Sofia Sveta Gora.

For the 12th year in a row, the National Archaeological Institute with Museum (NAIM) is organising the temporary exhibition Bulgarian Archaeology. The show traditionally presents the results of explorations conducted over the past season of archaeological fieldwork, putting on display some of the most interesting finds, along with extensive illustrations.

Located on a high plateau towering over the modern-day town of Provadia, eastern Bulgaria, the fortress of Ovech played an important role in the history of the medieval Bulgarian state. Initially built by the Byzantines in the 4th century, it was taken control of by the Bulgarians in the 7th century and actively used until the country fell under Ottoman rule at the end of the 14th century. However, it was not completely abandoned until the 17th century