The new St Paul’s Cathedral was designed by the architect Sir Christopher Wren and is his most famous building. Construction did not start until 1675 – it was delayed by fundraising, clearing the ruins and ongoing work on City churches. Parliament declared it complete in 1711, 45 years after the old cathedral had been destroyed.
Designing the dome was a massive challenge. Models were made to test ways of building it so it would not collapse. Wren designed many versions of the dome, even while it was being built. The dome was finished in 1708.