Viewed from the confine of City lanes, St Stephen Walbrook appears to be a very modest structure. Inside, however, this church designed by Christopher Wren proves to be one of the architectural wonders of late 17th Century Europe. Carried on eight Corinthian columns and eight arches punctuated by clear windows, is a magnificent coffered dome. This is a scale-model of the dome Christopher Wren had hoped to build over his original design for St Paul’s Cathedral. The Church Commissioners turned this down, and yet we can see what Wren had intended inside this quiet church . Although capacious, the 63ft (19.3m) dome - made of timber, plaster and copper - is, unlike that of St Paul’s, light, resting gently on St Stephen’s.