The first New Town was mainly completed by 1820, with the completion of Charlotte Square. This was built to a design by Robert Adam, and was the only architecturally unified section of the New Town. Adam also produced a design for St. George's Church, although his design was superseded by that of Robert Reid. The building, now known as West Register House, now houses part of the National Archives of Scotland. The north side of Charlotte Square features Bute House, formerly the official residence of the Secretary of State for Scotland and, since the introduction of devolution in Scotland, the official residence of the First Minister of Scotland.