The paleo-Hebrew alphabet was used in the ancient kingdoms of Israel and Judah. Following the exile of the Kingdom of Judah in the 6th century BCE during the Babylonian captivity, Jews began using a form of the Imperial Aramaic alphabet, another offshoot of the same family of scripts, which flourished during the Achaemenid Empire. The Samaritans, who remained in the Land of Israel, continued to use the paleo-Hebrew alphabet. During the 3rd century BCE, Jews began to use a stylized, "square" form of the Aramaic alphabet that was used by the Persian Empire (and which in turn had been adopted from the Assyrians), while the Samaritans continued to use a form of the paleo-Hebrew script called the Samaritan alphabet. After the fall of the Persian Empire in 330 BCE, Jews used both scripts before settling on the square Assyrian form.