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Strictly speaking a clock, by definition, rings a bell or 'clocca'. And there were no clocks before the 12th or 13th century AD. Candle 'clocks' existed before then, so presumably they must have been called something else. A 'hours-candle' perhaps? — Preceding unsigned comment added by 22.214.171.124 (talk) 17:02, 16 November 2011 (UTC)