Related Clues:

• Four times XIII
• Weeks in a Roman year?
• 53, in old Rome
• 52, in old Rome
• Full deck, to Romans
• Nero's full deck?
• Weeks per ''annum''
• Roman deck count?
• XIII x IV
• Roman 52
• Nero's 52
• Weeks in an annus
• 52, once
• Roman 53
• Year before Trajan was born