Confucius was a Chinese teacher, editor, politician, and philosopher of the Spring and Autumn period of Chinese history. The philosophy of Confucius, also known as Confucianism, emphasized personal and governmental morality, correctness...

Herodotus of Halicarnassus was a Greek historian who lived in the 5th century BC in Halicarnassus, Caria; Bodrum in modern Turkey. He is regarded as the "Father of History" in Western culture. He was the first historian known to collect his...

Leucippus or Leukippos was the first Greek to develop the theory of atomism — the idea that everything is composed entirely of various imperishable, indivisible elements called atoms — which was elaborated in far greater detail by his pupil...

Hippocrates of Kos was an ancient Greek physician. He has been called "the father of medicine", and is commonly regarded as one of the most outstanding figures in medicine of all time. He was a physician trained at the Dream temple of Kos,...

Democritus ("chosen of the people") was an Ancient Greek philosopher born in Abdera, Thrace, Greece. He was an influential pre-Socratic philosopher who formulated an atomic theory for the cosmos. His exact contributions are difficult to dis...

Ptolemy I Soter I, was a Greek Macedonian general under Alexander the Great, who became ruler of Egypt (323–283 BC) and founder of both the Ptolemaic Kingdom and the Ptolemaic Dynasty. In 305/4 BC he demanded the title of pharaoh. His mo...

Alexander III of Macedon, commonly known as Alexander the Great, was a king of Macedon, a state in the north eastern region of Greece, and by the age of thirty was the creator of one of the largest empires in ancient history, stretching fro...

Chandragupta Maurya was the founder of the Mauryan Empire and the first emperor to unify India into one state. He ruled from 322 BC until his voluntary retirement and abdication in favour of his son Bindusara in 298 BC. Chandragupta Maur...

Han Gaozu, Chinese emperor, reigned 206-194 B.C, during the Eastern Han dynasty. Emperor Gao, commonly known inside China as Gaozu, personal name Liu Bang, was the first emperor of the Chinese Han Dynasty, ruling over China from 202 BC unti...

Emperor Augustus of Rome was born with the given name Gaius Octavius on September 23, 63 B.C. He took the name Gaius Julius Caesar Octavianus (Octavian) in 44 B.C. after the murder of his great uncle, Julius Caesar. In his will Caesar had a...

Jesus (c. 4 BC – AD 30 / 33), also referred to as Jesus of Nazareth and Jesus of Galilee, is the central figure of Christianity, whom the teachings of most Christian denominations hold to be the Son of God. Christianity regards Jesus as the...

Heron of Alexandria was an ancient Greek mathematician who was a resident of a Roman province (Ptolemaic Egypt); he was also an engineer who was active in his hometown of Alexandria. He is considered the greatest experimenter of antiquity a...

Pliny the Elder was a Roman author, naturalist, and natural philosopher, as well as naval and army commander of the early Roman Empire, and personal friend of the emperor Vespasian. Spending most of his spare time studying, writing or in...

Claudius Ptolemy was a Greco-Egyptian writer of Alexandria, known as a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in the city of Alexandria in the Roman province of Egypt...

Aelius Galenus or Claudius Galenus, better known as Galen of Pergamum (modern-day Bergama, Turkey), was a prominent Roman physician and philosopher of Greek origin, and probably the most accomplished medical researcher of the Roman period....