Romanos I Lekapenos is crowned co-emperor of the underage Constantine VII.

Romanos I Lakapenos or Lekapenos, Latinized as Romanus I Lacapenus or Romanus I Lecapenus, was Byzantine emperor from 920 until his deposition in 944, serving as regent for and senior co-ruler of the young Constantine VII.

Constantine VII Porphyrogenitus was the fourth Byzantine emperor of the Macedonian dynasty, reigning from 6 June 913 to 9 November 959. He was the son of Emperor Leo VI and his fourth wife, Zoe Karbonopsina, and the nephew of his predecessor Alexander.

December 17 is the 351st day of the year in the Gregorian calendar; 14 days remain until the end of the year.