... are the world's closest capital cities, excluding Rome and the Vatican (and, arguably, Nicosia and Northern Nicosia). This was established two weeks ago, in Week 11 (30 January 2018 – General Knowledge, Question 54).
According to the Distance Calculator website, their centres are 5 miles (8 kilometres) apart as the crow flies. Across the river itself the distance is only about 2 miles (3.2 kilometres).
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