The design of this religious edifice was intended to have a medieval sense to it for the purposes of worship (Moore). Currently, it is not just Christians who express their faith in this structure, but several faiths are welcome (The Chapter of St. Paul's Cathedral). Thus, there remains an expression of this building that maintains an upward stance as we can see in the image, or the basis of the faith it is meant to serve. However, the idea that it has come to mean much more for others who are not of the Christian faith transforms the dome into something greater. The roundness of the dome gives a sense that it is not sharp, or in other words asserting one worldview of faith. This is a smooth structure devoid of angles or directness, possibly conveying the sense that a swirl of religious faiths, as opposed to one alone, combine to reach towards the heavens together.
Moore, Rowan. "360 degree buildings 1: St. Paul's Cathedral, London, built 1675-1711." guardian.co.uk. The guardian: The Observer, 4 June 2011. Web. 22 July 2011. <http://www.guardian.co.uk/artanddesign/2011/jun/05/st-pauls-cathedral>
The Chapter of St. Paul's Cathedral. "St. Paul's Cathedral: Cathedral History." stpauls.co.uk. 2012. Web. 22 July 2012. <http://www.stpauls.co.uk/Cathedral-History/Cathedral-History>