Judaism.
Judaism was established by Jehovah God.
Judaism was not "assembled". It came about through the rules established in the Torah, supported by the Prophets, and organized and expanded by the Rabbis.
it was never officially established or something like that... it was a slow evalution over the past 4,500 years or so
No. The original Ecclesia might have been considered a Jewish reform movement, but the various Ecumenical Councils established a religion with a very different basis and construction from Judaism, which makes Christianity a different religion from Judaism.
Abraham and his family founded Judaism in the Fertile Crescent. The lives of Abraham, Isaac and Jacob were mostly in Israel (Canaan). After a few centuries in Egyptian exile, the Israelites (who had by then become a large nation) established their civilization in Israel for many centuries.
Opposite of the lack of Judaism? Judaism.
There are no rooms in Judaism. Judaism is a religion, not a building.
Judaism is called Judaism.
The history of the Israeli flag is deeply rooted in the religion of Judaism and Jewish tradition. The Israeli flag was adopted by the country of Israel five months after the country was established.
The two established religions in the 16th Century (the 1500s) were Buddhism, Hinduism, Judaism, Islam, Christianity in the forms of Roman Catholicism, Eastern Catholicism, Lutheran, Anglican and other Protestantisms, Daoism, and one or more others that I'm inadvertently leaving out.
Judaism's real name, in English, is "Judaism".