You could describe the eighteenth century both ways. If you were speaking of, say, an event in ancient Egypt, you would say 1776 BC. If you were speaking of something such as the American Revolution, you would say 1776 AD. BC is the same as BCE and AD is the same as CE.
88 BCE is in the first century BC or BCE.
20th Century BCE.
The century for 561 bc, or more correctly 561 BC (also, BC is sometimes termed BCE) is: The 6th century BC
Germans don't appear in the historical literature in the 5th Century BCE so we don't know. They featured a people on the move who threatened Rome in the late 2nd Century BCE.
Hesiod - a farmer and philosopher author late 8th Century BCE. Homer - a bard who reduced the bardic stories to writing late 8th Century BCE. Aeschylus - a poet who wrote plays 5th Century BCE. Sophocles - a poet who wrote plays after Aeschylus 5th Century BCE.
The 14th Century BCE.
The 4th century BCE.
The 13th century BCE.
88 BCE is in the first century BC or BCE.
20th Century BCE.
5th Century BCE - in 490 BCE.
Third century BCE
5721 BCE is the 58th century BCE.
16th-century B.C.E. and 1550 B.C.E. is 50 years. The entire timeframe of 1501 B.C.E to 1599 B.C.E. is known as the 16th century. This would be true for each and every century.
301
The 20th century.
There were many - the most significant were:7th Century BCE - Dracon6th Century BCE - Solon, Peisistratus, Cleisthenes5th Century BCE - Ephialtes, Pericles