51 BC

Millennium:	1st millennium BC
Centuries:	2nd century BC – 1st century BC – 1st century
Decades:	80s BC  70s BC  60s BC  – 50s BC –  40s BC  30s BC  20s BC
Years:	54 BC 53 BC 52 BC – 51 BC – 50 BC 49 BC 48 BC

51 BC by topic
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Year 51 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Marcellus and Sulpicius.

Events

• Pompey demands that Julius Caesar end his command
• Cleopatra VII and her younger brother Ptolemy XIII begin co-rule of Egypt
• The Hsiung-nu split into two hordes

Births

• Publius Sulpicius Quirinius, Roman governor of Syria (d. 21 AD)
• Cheng, Emperor of the Han Dynasty of China (d. 7 BC)

Deaths

• Pharaoh Ptolemy XII of Egypt (b. 117 BC)
• Posidonius of Apamea, Greek philosopher, astronomer, geographer (b. c. 135 BC)