After 1800, the success of the first New Town led to grander schemes. The 'Northern New Town' (now usually called the Second New Town) aimed to extend Edinburgh from the north of Queen Street Gardens towards the Water of Leith, with extensions to the east and west. These developments took place mostly between 1800–1830. Initial designs by William Sibbald followed the original grid orientation of Craig’s First New Town, with entire streets being built as one construction. Building continued on an extended Hanover Street, called Dundas Street and, beyond Great King Street, Pitt Street (later renamed to Dundas Street in the 1960s), almost 1 km north towards the Water of Leith at Canonmills, where Bellevue Crescent would eventually mark the most northern extent of the New Town project. Streets were laid out either side with Great King Street the central avenue terminated by Drummond Place to the east and Royal Circus to the west. Northumberland Street and Cumberland Street were lesser streets to the south and north respectively. Heriot Row and Abercromby Place, both one-sided streets at the southern limit of the development, enjoyed open aspects to Queen Street Gardens. The builder for large sections of the Second New Town was George Winton.