Mega Spilaio
Commune of Kato Zachlorou, Greece · built 362
Mega Spilaio (lit. 'Great Cave'), formally the Monastery of the Dormition of the Theotokos, is a Greek Orthodox monastery in the municipality of Kalavryta, in the Peloponnese peninsula in southern Greece.
Monastery data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).