Old St Paul's Cathedral in length including the portico, and across the transepts, and Winchester Cathedral, the longest remaining medieval church, is long and across the transepts. The cathedral had one of Europe's tallest church spires, the height of which is traditionally given as , surpassing all but Lincoln Cathedral. The King's Surveyor, Christopher Wren (1632–1723), judged that an overestimate and gave . William Benham noted that the cathedral probably "resembled in general outline that of Salisbury, but it was a hundred feet longer, and the spire was sixty or eighty feet higher. The tower was open internally as far as the base of
St Paul's Cathedral, Melbourne the central spire, named the Moorhouse Spire, was completed to its full height of 312ft (95m), St Paul's became the tallest structure in central Melbourne and dominated the city's skyline when viewed from the south. The 1960s saw extensive work completed to the exterior of the cathedral and in 1989 the organ was restored with the help of a major National Trust appeal. Further major restoration works were completed in 2009 with significant repairs to the spires, the installation of a coloured glass Lantern in the Moorhouse Tower, and coloured glass doors and a glass walled airlock at the Great