In the ancient world there prevailed many cultures. Some of them flourished and reached to the highest point, but disappeared unexpectedly after some centuries or millenniums. History of the cultures is the History of humanity.
Culture disappears when collective outlook of the people who preserve the way of life, lose its vitality and stream of original culture ceases to flow. Still the disappearing cultures leave their imprint in the form of monuments, temples, inscriptions, myths, beliefs and memories of the past.
The Great Indian Sailors
Vietnam (Pandurang Dynasty)
Greece (Minon Cretan)