Belgrave Square is a large 19th-century garden square in London. It is the centrepiece of Belgravia, and its architecture resembles the original scheme of property contractor Thomas Cubitt who engaged George Basevi for all of the terraces for the 2nd Earl Grosvenor, later the 1st Marquess of Westminster, in the 1820s. Most of the houses were occupied by 1840. The square takes its name from one of the Duke of Westminster's subsidiary titles, Viscount Belgrave.