Okay kiddo, so a long, long time ago there was a city called Alexandria in Egypt. Some Jewish people started settling there around 300 BCE because they wanted to trade and have a better life.
These Jewish people were really smart and they contributed a lot to the city. They opened up schools, wrote books, and became knowledgeable in science, medicine, and philosophy. Some people even thought that Alexandria had one of the largest Jewish communities at that time.
But it wasn't always easy for the Jews in Alexandria. Sometimes they faced discrimination and other times they faced persecution. One really bad event happened in 38 CE when the Roman emperor at the time, named Caligula, ordered all the Jews to worship him instead of their own God. Many Jews refused to do this and were hurt or even killed because of it.
Another problem was that not all the Jewish people in Alexandria agreed on how to practice their faith. Some of them followed the Greek way of living and some of them followed the traditional Jewish way. This caused some conflicts.
Despite all these challenges, the Jewish people in Alexandria continued to flourish. Some really important Jewish scholars lived there like Philo of Alexandria and Maimonides. Even though there were some difficult times, the Jewish community in Alexandria made a big impact on history.