Foreigners called our country "a museum in an open air". This encyclopedia is a specific guide in four "saloons" of that museum: "Ancient Period"' "Middle Ages and Christianity"' "Nature and Lifestyle" and "Newest Period". More than 80 "wonders" included here are dear to Armenian reader. Maybe, this is the reason that the publishing house has chosen a little pretentious word "wonders" as a title for the book