The Late Antiquity Byzantine and medieval Bulgarian fortress and city of Kastritsi is located to the northeast of the Bulgarian Black Sea city of Varna, in the Euxinograd Residence of the Bulgarian government on the northern coast of the Bay of Varna. It occupies the St. George (St. Yani) Cape. The fortress of Kastritsi was built by the Byzantine (Eastern Roman) Empire in the 5th century AD, and was expanded in the 6th century AD. It was destroyed in the barbarian invasions of the Slavs and Avars in the early 7th century AD, and was abandoned. The Kastritsi Fortress was restored in the middle of the 13th century AD by the Second Bulgarian Empire (1186-1396 AD), and emerged as a medieval Black Sea city. The preserved medieval fortress walls rises to up to 3 meters. The outer fortress wall has a total of 5 rectangular fortress towers with a diameter of 5.5 meters, and a three-meter wide gate. The fortress’s keep is a rectangular multi-story tower located in its western corner. The inside of the fortress features the ruins of a city from the High and Late Middle Ages, including an entire densely populated residential quarter of stone-masonry homes, and a one-nave, one-apse church.
It is believed that Kastritsi is one of the Late Antiquity Byzantine fortresses on the Black Sea coast described by the 6th century AD Byzantine chronicler Procopius of Caesarea (ca. 500-ca. 560 AD) though its name was not mentioned. The Kastritsi Fortress was described in the early 14th century by cartographers from Genoa as in the High and Late Middle Ages it had thriving commercial relations with the Italian city-states Genoa and Venice. Kastritsi’s fortifications protected an area of 20 decares (app. 5 acres). The discovered skeletons of men, women, and children indicated that the city’s population was slaughtered by the invading Ottoman Turks who conquered the Second Bulgarian Empire at the end of the 14th century AD. The Turks settled Kastritsi briefly but abandoned the city in the 15th century (the most recent coins discovered there are from 1404 AD). Some Bulgarian archaeologists have hypothesized that the Ottoman Turks might have vacated the fortress of Kastritsi because of the raids of the Vlachs (Wallachians) from the north.
In the Late Middle Ages, Kastritsi was a typical medieval city with narrow streets and large homes. The archaeological remains of the medieval homes, streets, churches, and fortifications of Kastritsi are very well preserved allowing the Bulgarian archaeologists to discover lots of pottery vessels, metal tools, decorations, and over 2,500 coins. If it is researched more thoroughly, conserved, and exhibited, Kastritsi has the potential to show a fully preserved medieval Bulgarian city with a major potential for historical and cultural tourism, according to archaeologists.
The Kastritsi City and Fortress north of Bulgaria’s Varna is especially well preserved because it is inside the enclosed territory of the Euxinograd Residence of the Bulgarian government, which has been with limited public access since the end of the 19th century, meaning that treasure hunters and looters could not do damage to it, unlike what they have done to thousands of other archaeological and historical sites all over Bulgaria. The Euxinograd Residence was built on lands that the first ruler of Liberated Bulgaria, i.e. the Third Bulgarian Tsardom, Knyaz Alexander I Batenberg, received as a gift from the Greek Bishopric in Varna after Bulgaria’s Liberation from the Ottoman Empire in 1878. Thus, access to the site has been limited since 1890, and Kastritsi is said to be the only Bulgarian medieval city with a preserved port which has not seen any construction after the Late Middle Ages.
The Kastritsi Fortress and City was first excavated in 1899 by Czech-Bulgarian archaeologist Karel Skorpil, who, together with his brother Hermann Skorpil, is the founder of modern-day Bulgarian archaeology. Its most recent archaeological excavations have been conducted every summer since 2004 by archaeologists from the Varna Museum of Archaeology (Varna Regional Museum of History) led by its Director, Prof. Valentin Pletnyov. The recent archaeological discoveries there include a treasure of 166 silver coins of Bulgarian Tsar Ivan Alexander (r. 1331-1371 AD) and his son Mihail Asen, who was declared a “Co-Tsar" by Ivan Alexander in 1331 upon the latter’s assumption of the Bulgarian throne. Mihail Asen died in a battle against the Ottoman Turks near Sredets (today’s Sofia) in 1355 AD. The treasure in question is one of the largest medieval Bulgarian treasures discovered in recent years. In addition to these and many other Bulgarian coins, other0 treasure finds from Kastritsi include Byzantine, Tartar, Vlachian, Moldavian, Venetian, and Ottoman Turkish coins. These include a treasure of silver coins of Ottoman Sultan Bayezid I “The Lighting"(r. 1389-1402 AD) and of Wallacian ruler Mircea the Elder (Mircea I of Wallachia (r. 1386-1418 AD) who held the region of Dobrudzha (today’s Northeast Bulgaria and Southeast Romania) in the early 15th century. The finds also include a rare gold coin from the Antiquity minted in the Ancient Greek colony of Callatis (today’s Mangalia in Romania) during the reign of Lysimachus (r. 306-281 BC), one of Alexander I the Great’s generals, and one of his diadochi (successors) who became King of Macedon, Thrace, and Asia Minor.
The Bulgarian archaeologists have excavated more than one-fifth of the territory of the Kastritsi Fortress, have started some conservation efforts, and have opened part of the site for tourists.