Answer: mlx

AnswerCrossword Clue
MLX1,060, to Caesar
MLXHalf of MMCXX
MLXTwice DXXX
MLX1060, in Roman numerals
MLXFive-thirds of DCXXXVI
MLXCCXII quintupled
MLXHalf of CDXXIV quintupled
MLXSix years before the Battle of Hastings.
MLXSix years before the Norman Conquest.
MLXSix years before the Battle of Hastings
MLXWhen France's Philip I took the throne