Struma (river) in the context of "Agrianes"

The Rilska River (Bulgarian: Рилска река, Rilska reka, "Rila River") is a river in south-western Bulgaria, a left tributary of the Struma. The river is 51 km long and drains the western sections of the Rila mountain range.

Serres (Greek: Σέρρες [ˈseɾes] ) is a city in Macedonia, Greece, capital of the Serres regional unit and second largest city in the region of Central Macedonia, after Thessaloniki.

Serres is one of the administrative and economic centers of Northern Greece. The city is situated in a fertile plain at an elevation of about 70 metres (230 feet), some 24 kilometres (15 miles) northeast of the Strymon river and 69 km (43 mi) north-east of Thessaloniki, respectively. Serres' official municipal population was 70,703 in 2021.

Boril (Bulgarian: Борил) was the emperor (tsar) of Bulgaria from 1207 to 1218. He was the son of an unnamed sister of his predecessor, Kaloyan and Kaloyan's brothers, Peter II and Ivan Asen I, who had restored the independent Bulgarian state. After Kaloyan died unexpectedly in October 1207, Boril married his widow, a Cuman princess and seized the throne. His cousin, Ivan Asen, fled from Bulgaria, enabling Boril to strengthen his position. His other kinsmen, Strez and Alexius Slav, refused to acknowledge him as the lawful monarch. Strez took possession of the land between the Struma and Vardar rivers with the support of Stefan Nemanjić of Serbia. Alexius Slav secured his rule in the Rhodope Mountains with the assistance of Henry, the Latin Emperor of Constantinople.

Boril launched unsuccessful military campaigns against the Latin Empire and the Kingdom of Thessalonica during the first years of his reign. He convoked the synod of the Bulgarian Church in early 1211. At the assembly, the bishops condemned the Bogomils for heresy. After an uprising broke out against him in Vidin between 1211 and 1214, he sought the assistance of Andrew II of Hungary, who sent reinforcements to suppress the rebellion. He made peace with the Latin Empire in late 1213 or early 1214. After Henry died in 1216 and Andrew II left Hungary for a crusade, Ivan Asen returned to Bulgaria. He captured and blinded Boril in Tarnovo in 1218.

Sitalces (Sitalkes) (/sɪˈtælˌsiːz/; Ancient Greek: Σιτάλκης; reigned 431–424 BC) was one of the kings of the Thracian Odrysian state. The Suda called him Sitalcus (Σίταλκος).

He was the son of Teres I, and on the sudden death of his father in 431 BC succeeded to the throne. Sitalces enlarged his kingdom by successful wars, and it soon comprised the whole territory from Abdera in the south to the mouths of the Danube in the north, and from the Black Sea in the east to the sources of the Struma in the west.

The Pirin Mountains (Bulgarian: Пирин [ˈpirin]) are a mountain range in southwestern Bulgaria, with the highest peak, Vihren, at an altitude of 2,914 m (9,560 ft).

The range extends about 80 km (50 mi) from the north-west to the south-east and is about 40 km (25 mi) wide, spanning a territory of 2,585 km (998 sq mi). To the north, Pirin is separated from Bulgaria's highest mountain range, the Rila Mountain, by the Predel saddle, while to the south it reaches the Slavyanka Mountain. To the west is located the valley of the river Struma and to the east the valley of the river Mesta separates it from the Rhodope Mountains. Pirin is dotted with more than a hundred glacial lakes and is also the home of Europe's southernmost glaciers, Snezhnika and Banski Suhodol.

Kocherinovo (Bulgarian: Кочериново, pronounced [kot͡ʃɛˈrinovo]) is a town in southwestern Bulgaria, part of Kyustendil Province. It is the administrative centre of Kocherinovo Municipality, which lies in the southern part of Kyustendil Province. As of 2013 it had 2,255 inhabitants.

Kocherinovo is situated close to the left bank of the Struma River; its southernmost neighbourhood Levski lies at the confluence of the Struma and the Rilska River. The town is located 70 kilometres south of Sofia, 8 kilometres north of Blagoevgrad and 2 kilometres off European route E79 and Struma motorway, on the way to the Rila Monastery. In the 1930s, famous Bulgarian poet Nikola Vaptsarov worked in a Kocherinovo factory near the village of Barakovo as a stoker and a technician.

The Strumica (Macedonian and Bulgarian: Струмица, Macedonian pronunciation: [ˈstrumit͡sa] ; also transliterated Strumitsa or Strumitza) or Strumeshnitsa (Bulgarian: Струмешница) is a river in North Macedonia and Bulgaria. It runs through the town of Strumica and flows into the river Struma.

The Strumica takes its source from the Plačkovica mountain in Radoviš municipality in North Macedonia, running south in a deep valley and then known as the Stara Reka. It then enters the Radoviš Valley and runs through the eponymous town of Radoviš. Afterwards the Strumica runs southeastwards through the Strumica Valley (Vasilevo, Strumica and Novo Selo municipality), passing through the town of Strumica and turning east to enter Bulgaria south of Zlatarevo. A wide meandering valley follows until the river flows into the Struma as a right tributary northeast of Mitino, not far from Rupite.