After the occupation by Alexander the Great in 332 BCE, Egypt came under Greek rule and influence. The city of Alexandria was founded by Alexander after the conquest and during the 3rd and 2nd centuries BCE, the scholars of Alexandria were prolific writers. It was in 'Alexandrian Egypt' that Babylonian astrology was mixed with the Egyptian tradition of Decanic astrology to create Horoscopic astrology. This contained the Babylonian zodiac with its system of planetary exaltations, the triplicities of the signs and the importance of eclipses. Along with this it incorporated the Egyptian concept of dividing the zodiac into thirty-six decans of ten degrees each, with an emphasis on the rising decan, the Greek system of planetary gods, sign rulership, and the four elements.