1st century BC in the context of "1 BC"

Caput Mundi is a Latin phrase which literally means "Head of the world" whereas Roma Caput Mundi means "Rome capital of the world" and is one of the many nicknames given to the city of Rome throughout its history. The phrase is related to the enduring power of the city first as the capital of the Republic and the Empire, and later as the centre of the Catholic Church.

Although it is not known for sure when it was first used, Rome was already named in this way by the poet Ovid in 1st century BC. Along with "Eternal City" and the "City of Seven Hills", Caput Mundi remains as one of the most commonly used names to refer to the city of Rome.

The 1st millennium BC, also known as the last millennium BC, was the period of time lasting from the years 1000 BC to 1 BC (10th to 1st centuries BC; in astronomy: JD 1356182.5 – 1721425.5). It encompasses the Iron Age in the Old World and sees the transition from the Ancient Near East to classical antiquity.

World population roughly doubled over the course of the millennium, from about 100 million to about 200–250 million after the birth of Jesus Christ and the establishment of the Julio-Claudian dynasty led by its founder Octavian.

The 1st century was the century spanning AD 1 (represented by the Roman numeral I) through AD 100 (C) according to the Julian calendar. It is often written as the 1st century AD or 1st century CE to distinguish it from the 1st century BC (or BCE) which preceded it. The 1st century is considered part of the Classical era, epoch, or historical period. The Roman Empire, Han China and the Parthian Persia were the most powerful and hegemonic states.

During this century, the Roman Empire (ruled by the Julio-Claudian and Flavian dynasties) continued to be in a period of relative stability known as Pax Romana, withstanding a financial crisis in 33 and a civil war in 69. In Europe, Rome expanded into Britain and fought wars in Germania and Dacia. In Africa, Rome was challenged by Tacfarinas, who led his own Musulamii tribe and a loose and changing coalition of other Berber tribes before being defeated in 24. In West Asia, Rome defeated a Jewish rebellion (66–73) and fought a war with Parthia from 58–63, though the latter conflict was inconclusive. In East Asia, the Chinese Western Han dynasty was overthrown and replaced by the Xin dynasty in 9, which in turn faced its own rebel movements (namely the Red Eyebrows and Lulin), and was replaced by the Eastern Han dynasty in 25. The Eastern Han dynasty then faced and quelled a rebellion by the Trưng sisters (40–43). In 58, the Eastern Han dynasty entered a golden age with the Rule of Ming and Zhang, who were generally regarded as able administrators who cared about the common welfare of the people and who promoted officials with integrity. On its northern frontier, the Chinese dynasties waged intermittent war with the Xiongnu before emerging victorious in 91. The states of Funan and Xianbei were also established in this century.

Tiberius Claudius Nero (c. 82 – 33 BC) was a Roman politician, senator, and praetor who lived in the 1st century BC.

He was notable for being the first husband of Livia Drusilla, before she divorced him to marry the future emperor Augustus, and the biological father of the second Roman emperor Tiberius.

The av beit din (Hebrew: אָב בֵּית דִּין, romanized: ʾāḇ bēṯ din, lit. 'chief of the court, chief justice'), abbreviated abd (אב״ד avad), was the second-highest-ranking member of the Sanhedrin during the Second Temple period and served as an assistant to the nasi. The av beit din was known as the "Master of the Court;" he was considered the most learned and important of these seventy members.

Menahem the Essene served as av beit din in the 1st century BC before abdicating to "serve the King" in 20 BC. The House of Shammai attained complete ascendency over the Sanhedrin from 9 CE until Gamaliel became nasi in 30 CE. The post of av beit din was eventually filled since the Babylonian Talmud states that Joshua ben Hananiah was the av beit din in Baba Kamma 74b and Nathan the Babylonian was av beit din in Horayot 13b in the Babylonian Talmud. The Jerusalem Talmud tells the story of how Gamaliel II was deposed and Eleazar ben Azariah replaced him as Nasi. After Gamaliel was reinstated, Eleazar ben Azariah was made av beit din. The parallel story in the Babylonian Talmud has Eleazar ben Azariah remaining as a co-nasi with Gamaliel.