Possible Clues:

• Period when metalworking began
• Early metalworking period, perhaps
• Period which began in the Middle East about 1100BC
• Irish cardinal collecting silver for a time
• A region troubled in time long ago
• Period in Europe starting around 1100 B.C
• Archeological period
• When coins became common
• Smooth, mature -- when 16 discovered heavy metal
• Ignore a funny old epoch