The Vetrino I barrow cemetery consists of more than 30 tumuli. located West of the Vetrino and Sredno Selo vilages, dates to the Bronze Age
Sources:
- Alexandrov Stefan, Slavchev Vladimir, Tonkova Eva. Rescue Excavations of Bronze Age Barrows in Vetrino Region, northeast Bulgaria. In: Materiale şi cercetãri arheologice (Serie nouã), N°17 2021. pp. 5-48.