Aladzha Cave Monastery

Byzantine Cave monastery near modern Aladzha Monastery dates to the fourth by fragments of glassware. The coins of Justinian indicate that the complex may have still been in use during the 500s¹.

See:

1. Florin Curta, The making of the slavs: history and archaeology of the Lower Danube Region, Cambridge University Press 2001, p.149 - http://www.limesromanus.org/sites/all/files/The%20Making%20of%20the%20Slavs.pdf

References

1. ↑Florin Curta,2001, p. 149