Optima bank HQ's are located in Maroussi"Maroussi", in, Profile, published by Athens Exchange Group & (location) ENISA Athens office in Maroussi, Published by the European Union Agency for Cybersecurity - accessed 2020-01-26 ("location" using p.2 of "where is Maroussi") of Athens (Aigialeias 32 and Paradissou street).
