blocks of Thistle Street were renamed Hill Street and Young Street, making Thistle Street half the length of Rose Street. The three streets completing the grid, Castle, Frederick and Hanover Streets, were named for the view of the castle, King George's second son Prince Frederick, and the House of Hanover respectively. Development Craig's proposals hit further problems when development began. Initially the exposed new site was unpopular, leading to a £20 premium being offered to the first builder on site. This was received by John Young who built Thistle Court, the oldest remaining buildings in the New Town, at the east end of Thistle Street in 1767. Instead of building as a terrace as envisaged, he built a small courtyard. Doubts were overcome soon enough, and further construction started in the east with St. Andrew Square. Craig had intended that the view along George Street be terminated by two large churches, situated at the outer edge of each square, on axis with George Street. Whilst the western church on Charlotte Square was built, at St Andrew Square the land behind the proposed church site was owned by Sir Lawrence Dundas. He decided to build a town mansion here and commissioned a design from Sir William Chambers. The resulting Palladian mansion, known as Dundas House, was completed in 1774. In 1825 it was acquired by the Royal Bank of Scotland and today is the registered office of the bank.. The forecourt of the building, with the equestrian monument to John Hope, 4th Earl of Hopetoun, occupies the proposed church site. St. Andrew's Church had to be built on a site on George Street. The lack of a visual termination at the end of this street was remedied in 1823 with William Burn's monument to Henry Dundas. 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 Adam also produced a design for St. George's Church, although his design was superseded by that of Robert Reid.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