Even if the Wren going disputes with the construction of the cathedral on the project, began preliminary construction work. They then treat the area at the new site. Some walls of the old cathedral standing still covered in lead, which molten, spłynął from the roof during felernego fire. To destroy them, it was necessary to use explosives, as well as 30-meters of the tyrant. By building a new wall to keep the entire burden, it was then najwytrzymalszego use of these materials then available. Used so the stone quarries in Portland, which transported to London on the shoulders. The whole building was quite a significant sum of money, which covered the tax.