Complex sentence: In the 19th century it tended to refer to the Near East such as Mesopotamia such as the Oriental collection at the British Museum which covers Assyria, Babylon, Sumeria and other places in that proximity, or the Orient Express which went to Istanbul.
Split into simpler sentences: In the 19th century it tended to refer to the Near East such as Mesopotamia. The Oriental collection at the British Museum covers Assyria, Babylon, Sumeria and other places in that proximity, The Orient Express was the name of a train which went to Istanbul.