This is one of the busiest areas in the city, given its location at the junction between Avinguda Diagonal and Gran Via de Carles III and the powerful shopping centres and big-company headquarters it houses. Its most interesting feature is its significant architectural setting. It houses two unique buildings on the Pedralbes side in the north: Residència d’Oficials (an example of the city’s recent Francoist history), and the old Palau Abadal, a remarkable Neoclassical building. The Les Corts side in the south west houses the Grupo Planeta’s headquarters with its characteristic facade-garden, and El Cub, an important glazed building that holds a shopping centre. A little further down are the Trade buildings, an example of contemporary Catalan architecture. The Maternitat side in the south east gives you a view of the slim and elegant La Caixa buildings. Apart from sculptural elements linked to some of these buildings, the square has an interactive sundial on the surface of the small mountain-facing block. To know the time, you have to stand on the area representing the corresponding month of the year, so that the shadow you project shows the approximate solar time. The work is by Quim Deu.