AAIA meaning in Regional ?

Answer:

What is Australian Archaeological Institute at Athens mean?

The Australian Archaeological Institute at Athens (AAIA) (Greek: Αυστραλιανό Αρχαιολογικό Ινστιτούτο Αθηνών) is one of the seventeen foreign archaeological institutes in Greece. Founded in 1980, it aims to promote Greek studies in Australia, as well as to enable Australian scholars to engage in archaeological fieldwork in Greece. The Institute has been involved in projects in excavations at Torone (Greek Macedonia), Zagora (Andros), and in the Paliochora survey (Kythira).

reference

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Australian Archaeological Institute at Athens	Regional