73 BC

Millennium:	1st millennium BC
Centuries:	2nd century BC – 1st century BC – 1st century
Decades:	100s BC 90s BC 80s BC – 70s BC – 60s BC 50s BC 40s BC
Years:	76 BC 75 BC 74 BC – 73 BC – 72 BC 71 BC 70 BC

73 BC by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments

**73 BC in other calendars**
Gregorian calendar	73 BC
Ab urbe condita	681
Armenian calendar	N/A
Bahá'í calendar	-1916 – -1915
Bengali calendar	-665
Berber calendar	878
Buddhist calendar	472
Burmese calendar	-710
Byzantine calendar	5436 – 5437
Chinese calendar	[[Sexagenary cycle\|]]年 (2564/2624) — to — [[Sexagenary cycle\|]]年 (2565/2625)
Coptic calendar	-356 – -355
Ethiopian calendar	-80 – -79
Hebrew calendar	3688 – 3689
Hindu calendars
- Bikram Samwat	-16 – -15
- Shaka Samvat	N/A
- Kali Yuga	3029 – 3030
Holocene calendar	9928
Iranian calendar	694 BP – 693 BP
Islamic calendar	715 BH – 714 BH
Japanese calendar
Korean calendar	2261
Thai solar calendar	471

Year 73 BC was a year of the pre-Julian calendar.

Events

Traditional date that Lud became King of Britain, according to Geoffrey of Monmouth.

Third Servile War begins with gladiators, led by the Thracian Spartacus, breaking out of a gladiatorial training school in Capua and forming an army, made up of runaway slaves and others with little to lose. With some 70,000 men, Spartacus rampages throughout Campania, assaulting the prosperous cities of Cumae, Nola and Nuceria.