Ruse (also transliterated as Rousse or Russe; Bulgarian: Русе pronounced [ˈrusɛ]) is the fifth-largest city in Bulgaria. Ruse is located in the northeastern part of the country, on the right bank of the Danube, opposite the Romanian city of Giurgiu, 300 km (186 mi) from the capital Sofia and 200 km (124 mi) from the Bulgarian Black Sea Coast. It is the most significant Bulgarian river port, serving an important part of the international trade of the country.

Ruse is known for its 19th- and 20th-century Neo-Baroque and Neo-Rococo architecture, which attracts many tourists. It is often called the Little Vienna. The Ruse-Giurgiu Friendship Bridge, the only one in the shared Bulgarian-Romanian section of the Danube, crosses the river here.

Ruse is located on the right bank of the Danube, which is the high bank, having two underwater terraces and three river terraces at 15–22 m (49.21–72.18 ft), 30–66 m (98.43–216.54 ft), and 54–65 m (177.17–213.25 ft). The average altitude is 45.5 m (149.28 ft) AMSL. The urban area is an approximately 11-km ellipse running along the river. The city extends from the land-connected Matey (Матей) island and the mouth of Rusenski Lom on the west to Srabcheto (Сръбчето) hill on the east. During the 20th century, the west end of the city was significantly modified by moving the mouth of Rusenski Lom to the west, as well as by moving the bank itself with its fairway considerably to the north. Sarabair (саръбаир) hill is to the south of the city and is 159 m (521.65 ft) high. The Rousse TV Tower is built there on the remains of Leventtabia, a former Turkish fortification.

Coordinates: 42°45′N 25°30′E / 42.75°N 25.5°E / 42.75; 25.5

Bulgaria ⁱ/bʌlˈɡɛəriə/ (Bulgarian: България, IPA: [bɤ̞ɫˈɡarijɐ]), is a country located in Southeastern Europe. It is bordered by Romania to the north, Serbia and the Macedonia to the west, Greece and Turkey to the south and the Black Sea to the east. With a territory of 110,994 square kilometres (42,855 sq mi), Bulgaria is Europe's 14th-largest country. Its location has made it a historical crossroad for various civilisations and as such it is the home of some of the earliest metalworking, religious and other cultural artifacts in the world.

Prehistoric cultures began developing on Bulgarian lands during the Neolithic period. Its ancient history was marked by the presence of the Thracians, and later by the Greeks and Romans. The emergence of a unified Bulgarian ethnicity and state dates back to the First Bulgarian Empire, which dominated most of the Balkans and functioned as a cultural hub for Slavic peoples during the Middle Ages. With the downfall of the Second Bulgarian Empire in 1396, its territories came under Ottoman rule for nearly five hundred years. The Russo-Turkish War of 1877–1878 resulted in the Third Bulgarian State, recognised in 1908. The following years saw several conflicts with its neighbours, which prompted Bulgaria to align with Germany in both World Wars. In 1946 it became a Communist republic with a single-party system until 1989, when the Communist Party allowed multi-party elections. After 1990 Bulgaria transitioned to democracy and a market-based economy.