On his return, the contentions regarding pulling down old St. Paul's were rife as ever; but the following year the fire occurred, and Wren was commissioned to make a plan for the rebuilding of the City. He proposed to restore it on a regular plan, with wide streets and piazzas, and for the banks of the river to be kept open on both sides with spacious quays. But these designs were defeated by the ignorance and selfishness of the inhabitants and traders, and the banks of the Thames became once more blocked up with wharves and warehouses, narrow and winding lanes; and Wren could only devote his architectural talent to the churches, the Royal Exchange, and Custom House. These latter buildings were completed in the three following years; they have since both been burnt down and rebuilt. Temple Bar, a hideous erection, was finished in the fourth year, 1670. All this time the commencement of the new St. Paul's was impeded by the attempts of the commissioners to restore the old tumbling fabric, and it was only by successive fallings-in of the ruins that they were compelled to allow Wren to remove the whole decayed mass, and clear the ground for the foundations of his cathedral. These were laid in 1675, nine years after the fire, and the building was only terminated in thirty-five years, the stone on the summit of the lantern being laid by Wren's son, Christopher, 1710. The choir, however, had been opened for divine service in 1697, in the twenty-second year of the erection. During this long period Sir Christopher had been busily employed in raising many other buildings; amongst these, the Royal Observatory, Greenwich; St. Bride's; St. Swithin's; the Gateway Tower, Christ Church, Oxford; St. Antholin's, Watling Street; the palace at Winchester, never completed; Ashmolean Museum, and Queen's College Chapel, Oxford; St. James's, Westminster; St. Clement's, Eastcheap; St. Martin's, Ludgate Hill; St. Andrew's, Holborn; Christ Church, Newgate Street; Hampton Court Palace, an addition; Morden College, Blackheath; Greenwich Hospital; St. Dunstan's-in-the-East, tower and spire; Buckingham House, since pulled down; and Marlborough House.