During Japan’s Sengoku “Warring States” era (1467-1615), castles were constructed, bolstered and fortified all across the Japanese archipelago, resulting in approximately 5,000 individual keeps.

Katsuren Castle in Okinawa, Japan is an unlikely place for a cache of ancient Roman coins. Wikimedia Commons/Public Domain There are plenty of things you’d expect to find in the ruins of a 12 ...

It's believed to be a first — and it certainly came as a surprise: Ancient Roman coins have been found in the ruins of a castle in Okinawa, Japan, that dates to the 12th and 15th centuries.