Cleopatra's Needles: The Lost Obelisks of Egypt

In the half-century between 1831 and 1881 three massive obelisks left Egypt for new lands. Prior to these journeys, the last large obelisk moved was the Vatican obelisk in 1586 – one of the great engineering achievements of the Renaissance. Roman emperors moved more than a dozen, but left no records of how they did it. The nineteenth-century engineers entrusted with transporting the obelisks across oceans had to invent new methods, and they were far from certain that they would work. As the...