The Grand Place (French, pronounced: also used in English) or Grote Markt listen (Dutch) is the central square of Brussels. It is surrounded by guildhalls, the city's Town Hall, and the Breadhouse (French: Maison du Roi, Dutch: Broodhuis). The square is the most important tourist destination and most memorable landmark in Brussels, along with the Atomium and Manneken Pis. It measures 68 by 110 metres (223 by 360 ft), and it is a UNESCO World Heritage Site. In the 10th century, Charles, Duke of Lower Lorraine constructed a fort on Saint-Géry Island, the point at which the Senne river became navigable.
This was the seed of what would become Brussels. By the end of the 11th century, an open-air marketplace was set up on a dried-up marsh near the fort that was surrounded by sandbanks. The market was called the Nedermerckt, or Lower Market.