Bicycle Obelisk By Mark Grieve And Ilana Spector

Re-erecting the obelisk had daunted even Michelangelo, but Sixtus V was determined to erect it in front of St Peter's, of which the nave was yet to be built. He had a full-sized wooden mock-up erected within months of his election. Domenico Fontana, the assistant of Giacomo Della Porta in the Basilica's construction, presented the Pope with a little model crane of wood and a heavy little obelisk of lead, which Sixtus himself was able to raise by turning a little winch with his finger. Fontana was given the project.
The obelisk, half-buried in the debris of the ages, was first excavated as it stood; then it took from April 30 to May 17, 1586 to move it on rollers to the Piazza: it required nearly 1000 men, 140 carthorses, 47 cranes. The re-erection, scheduled for September 14, the Feast of the Exaltation of the Cross, was watched by a large crowd. It was a famous feat of engineering, which made the reputation of Fontana, who detailed it in a book illustrated with copperplate etchings, Della Trasportatione dell'Obelisco Vaticano et delle Fabriche di Nostro Signore Papa Sisto V (1590), which itself set a new standard in communicating technical information and influenced subsequent architectural publications by its meticulous precision. Before being re-erected the obelisk was exorcised. It is said that Fontana had teams of relay horses to make his getaway if the enterprise failed. When Carlo Maderno came to build the Basilica's nave, he had to put the slightest kink in its axis, to line it precisely with the obelisk.
An obelisk stands in front of the church of Trinità dei Monti, at the head of the Spanish Steps. Another obelisk in Rome is sculpted as carried on the back of an elephant. Rome lost one of its obelisks, which had decorated the temple of Isis, where it was uncovered in the 16th century. The Medici claimed it for the Villa Medici, but in 1790 they moved it to the Boboli Gardens attached to the Palazzo Pitti in Florence, and left a replica in its stead.
Several more Egyptian obelisks have been re-erected elsewhere. The best-known examples outside Rome are the pair of 21 m/68 ft Cleopatra's Needles in London(69 feet 187 tons) and New York City(70 feet 193 tons) and the 23 m/75 ft 227 ton obelisk at the Place de la Concorde in Paris.