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
Cathedral of Learning deliver the stone on schedule, so construction was delayed, and work began on the higher stories. When construction started on the Cathedral of Learning in 1926, it was the tallest building in Pittsburgh, although the Gulf Tower (1932) was completed and surpassed it by the time the Cathedral of Learning was officially dedicated in June 1937. Today, it remains the tallest educational building in the Western hemisphere, the second tallest university building in the world behind the 36 story, 240 m (including a 57 m spire) Moscow State University main building completed in 1953, and the fourth tallest educational building