Complex sentence: It may date to pre-Islamic times, constructed by the Sabaeans in the mid 3rd century by the last great Sabaean King Ilsharah Yahdub, although some historians date it to the beginning of the 2nd century or even the 1st century.
Split into simpler sentences: It may date to pre-Islamic times, constructed by the Sabaeans in the mid 3rd century by the last great Sabaean King Ilsharah Yahdub. Some historians date it to the beginning of the 2nd century or the 1st century.