The Lakhmid Kingdom was founded by the Lakhum tribe that immigrated out of Yemen in the 2nd century and ruled by the Banu Lakhm, hence the name given it. It was formed of a group of Arab Christians who lived in Southern Iraq, and made al-Hirah their capital in (266). The founder of the dynasty was 'Amr and the son Imru' al-Qais converted to Christianity. Gradually the whole city converted to that faith. Imru' al-Qais dreamt of a unified and independent Arab kingdom and, following that dream, he seized many cities in Arabia.