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 English churches, to a "better manner of architecture". It has the longitudinal Latin Cross plan of a medieval cathedral. It is of one-and-a-half stories and has classical porticos at the west and transept ends, influenced by Inigo Jones’s addition to Old St Paul's. It is roofed at the crossing by a wide shallow dome supporting a drum with a second cupola, from which rises a spire of seven diminishing stages. Vaughan Hart has suggested that influence in the design of the spire may have been drawn from the oriental pagoda. Not used at St Paul's, the concept was applied in