The real beginning of astrology should be considered with the development of Hellenistic Astrology. Hellenistic astrology is a complex, traditional, horoscopic astrology, got its name from the region and period, in which it was being practiced i.e., surrounding Mediterranean region (Hellenistic Egypt or Mesopotamia) and Hellenistic period (1st century B.C.).
With blending of ideas, thoughts and multicultural activities, the complex tradition that prospered was known as Hellenistic Astrology.
Though the exact period is not known, it is believed that its practice began in sometime 3rd century B.C., after Alexander the Great conquered Persia and so many cultures came under one rule, resulting in single official language and same pattern of life.
It is also believed that Hellenistic astrology was practiced until the 7th century B.C. approximately. This astrology, being the ancient of all the modern types of astrology influenced many other subsequent traditions of astrology across Europe, The Middle-East, Africa and India and no doubt, it is still flourishing around the world.
Hellenistic astrology tells us about three things.
1. Universal astrology (Mundane Astrology): Natural calamities and destruction which affect a large group of people or nations: Earthquakes, Eruption of volcanoes, floods, epidemic diseases and also War among two or more countries
2. Natal Astrology: Natal astrology is the majority of the text found and it tells us about the personality of individual and other future prospects, by creating the birth chart with the help of the time and date of birth of the individual. The concept of Houses (in birth chart) and other aspects of Hellenistic astrology which were practiced in that period are still used today.
3. Katarchic astrology or electional astrology: This helps individuals to know the best time to do something according to their chart, by electing and picking up the perfect date for a particular event.
Recently, there is revival of Hellenistic astrology, due to translation of the texts from Greek and Latin languages to other languages as well, which have been published in last few decades.