Complex sentence: One of the major collections of rock-cut tombs in Israel is the necropolis of the ancient Kingdom of Judah which had its capital in the City of David, they were cut between the 9th and 7th centuries BCE.
Split into simpler sentences: One of the major collections of rock-cut tombs in Israel is the necropolis of the ancient Kingdom of Judah which had its capital in the City of David. These were cut between the 9th and 7th centuries BCE.