Via Gemina was the Roman road

Roman road

The Roman roads were a vital part of the development of the Roman state, from about 500 BC through the expansion during the Roman Republic and the Roman Empire. Roman roads enabled the Romans to move armies and trade goods and to communicate. The Roman road system spanned more than 400,000 km...

 linking Aquileia

Aquileia

Aquileia is an ancient Roman city in what is now Italy, at the head of the Adriatic at the edge of the lagoons, about 10 km from the sea, on the river Natiso , the course of which has changed somewhat since Roman times...

 and Emona

Emona

Emona or Aemona, short for Colonia Iulia emona, was a Roman castrum founded in 14-15 AD, possibly by the Legio XV Apollinaris , on a territory already populated by ancient settlers of uncertain origin...

 (the modern Ljubljana

Ljubljana

Ljubljana is the capital of Slovenia and its largest city. It is the centre of the City Municipality of Ljubljana. It is located in the centre of the country in the Ljubljana Basin, and is a mid-sized city of some 270,000 inhabitants...

). It took its name, the "twin road", from the circumstance that it departed from Aquileia along with the Via Postumia

Via Postumia

The Via Postumia was an ancient Roman road of northern Italy constructed in 148 BC by the consul Spurius Postumius Albinus Magnus.It ran from the coast at Genua through the mountains to Dertona, Placentia and Cremona, just east of the point where it crossed the Po River...

. The road, which contributed to the rapid Romanization

Romanization

In linguistics, romanization or latinization is the representation of a written word or spoken speech with the Roman script, or a system for doing so, where the original word or language uses a different writing system . Methods of romanization include transliteration, for representing written...

 of Istria

Istria

Istria , formerly Histria , is the largest peninsula in the Adriatic Sea. The peninsula is located at the head of the Adriatic between the Gulf of Trieste and the Bay of Kvarner...

, went from Aquileia through Tergeste (modern Trieste

Trieste

Trieste is a city and seaport in northeastern Italy. It is situated towards the end of a narrow strip of land lying between the Adriatic Sea and Italy's border with Slovenia, which lies almost immediately south and east of the city...

) and the Karst district, passing near or through the modern settlements of Materija

Materija

Materija is a small settlement in the Hrpelje-Kozina Municipality in the Littoral region of Slovenia.-External links:*...

, Obrov

Obrov

Obrov is a village in the Hrpelje-Kozina Municipality in the Littoral region of Slovenia.The local church is dedicated to The Annunciation and belongs to the Hrušica Parish.-External links:*...

 and Klana

Klana

Klana is a municipality in the Primorje-Gorski Kotar County in western Croatia.There are 1,978 inhabitants, in the following settlements:* Breza, population 60* Klana, population 1,199* Lisac, population 112* Studena, population 383...

, whence, near Flumen (modern Rijeka

Rijeka

Rijeka is the principal seaport and the third largest city in Croatia . It is located on Kvarner Bay, an inlet of the Adriatic Sea and has a population of 128,735 inhabitants...

), it descended towards Trsat

Trsat

Trsat is part of the city of Rijeka, Croatia. It has a historic castle or fortress in a strategic location and several historic churches. The Croatian noble Prince Vuk Krsto Frankopan is buried in one of the churches. Trsat is a steep hill, 138 m high, rising over the gorge of the Rječina river,...

 to continue along the Dalmatian coast

Dalmatia

Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....

.