Seuthopolis, a city of the ancient Odrysian Kingdom in Thrace, was uncovered during the construction of the Koprinka Dam, and is now under the reservoir. Plans to build a circular dyke and develop the heritage site have been on hold since the financial crash of 2008. Source.And.
Bulgaria is not a hockey power. The Bulgarian national squad currently ranks 37th in the IIHF World Ranking, out of 48 countries, and plays internationally in Division III. But, they're playing hockey, and have been since at least 1952 when their first national championship was held. How is their domestic league organized?
Frugally. The Bulgarian Hockey League (properly Държавното първенство по хокей на лед or Dŭrzhavno pŭrvenstvo po khokeĭ na led or State Championship of Ice Hockey) consists of four clubs, all of them located in the capital Sofia, and three of them in the same rink, the Sofia Winter Sports Palace, capacity 2,500.
Two things stand out about this league. One, it's a Soviet creation and does a fine job of maintaining the look and feel of the Soviet era. Two, it has adopted the organizational logic of a senior city hockey league. In the 1920s Ottawa and Montreal had high-quality city leagues that acted as feeder systems for their professional franchises and were not heavy on travel or building maintenance costs. In the case of Sofia the club at the top of the food chain is the Bulgarian national team.
The schedule is brief. In recent years the number of league games per team has ranged from 8 to 12. There is a Bulgaria Cup competition that runs concurrent with the league.
The clubs are:
HK CSKA Sofia. Founded in 1964. 14 times Bulgarian league champions. 13 times Bulgarian Cup winners. Colours: red and white.
HK Levski Sofia. 13 times Bulgarian champs. 17 times Bulgarian Cup winners. Winter Sports Palace. Blue and gold.
HK NSA Sofia. The National Sports Academy team. Founded in 2009. They play at the Winter Sports Palace. White, blue, black and gold.
HK Slavia Sofia. 21 times Bulgarian league champions.12 times Bulgarian Cup winners. They play in their own rink, Slavia Ice Stadium. Black and white.