Which Roman provinces included the territory of present-day Bulgaria?

During the Roman period, the territory of present-day Bulgaria was primarily divided between two major provinces:

• Moesia: This province encompassed the lands located to the north of the Balkan Mountains, extending toward the Danube River.1
• Thrace: This province covered the region to the south of the Balkan Mountains.1

These provinces were integral parts of the Roman Empire, and the area was strategically significant, serving as a transit point for the main land route connecting the West to the Middle East. Numerous archaeological sites, such as those found in Plovdiv and Varna, provide evidence of the extensive Roman presence in these regions.1