Dvin (Armenian: Դվին; Greek: Δούσιος or Τίβιον; also Duin or Dwin according to ancient sources) was a large commercial city and the capital of early medieval Armenia. It was situated north of the previous ancient capital of Armenia, the city of Artaxata, along the banks of the Metsamor River, 35 km to the south of modern Yerevan. The site of the ancient city is currently not much more than a large hill located between modern Hnaberd (just off the main road through Hnaberd) and Verin Dvin, Armenia. Systematic excavations at Dvin that have proceeded since 1937 have produced an abundance of materials, which have shed light into the Armenian culture of the 5th to the 13th centuries.

Ancient Armenian literary sources almost always give the name of the ancient city of Dvin as Dwin or Duin. Later authors favored the Dvin appellation, which is the most common form given in scholarly literature.

The ancient city of Dvin was built by Khosrov III of Armenia in 335 on a site of an ancient settlement and fortress from the third millennium B.C. Since then, the city had been used as the primary residence of the Armenian Kings of the Arsacid dynasty. Dvin boasted a population of about 100,000 citizens in various professions, including arts and crafts, trade, fishing, etc.

Coordinates: 40°01′31″N 44°35′27″E / 40.02528°N 44.59083°E / 40.02528; 44.59083

Verin Dvin (Armenian: Վերին Դվին; also, Aysori Dvin and Verkhniy Dvin) is a village in the Ararat Province of Armenia located 30 kilometers away from Yerevan. The largest Assyrian community in Armenia is in Verin Dvin, where the majority of the residents in the village are ethnic Assyrians. The village also has two Assyrian churches including one that was built in 1828. It is also located near the ruins of the ancient city of Dvin.