You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the city of babylon cease to exist?" whose answer is c. AD 1000.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the city of babylon cease to exist
Useful Output:

Doc 1: The lighthouse was torn down in the Middle Ages and replaced with a mosque. About three centuries later, a fort was built from its ruins. While
Doc 2: Under the Caliphates, Babylonia was finally abolished as a provincial unit. It's not exactly clear when the site of Babylon itself was finally
Doc 3: The Hanging Gardens of Babylon was built in 600 BC and was destroyed by earthquake in 226 BC.  Although the original no longer exists, it was thought to
Doc 4: Following Hammurabi's death, his empire fell apart and Babylonia dwindled in size and scope until Babylon was easily sacked by the Hittites in 1595 BCE. The
Doc 5: In the 1980s, Babylon was extensively reconstructed by the Iraqi ruler Saddam Hussein, so there is little of the original city that is still